Overview › Code › R103
Code · blind round

R103 · Wireworld with a clock and a diode

blind round 9/11 local models answered

Every answer below carries the name of the model that wrote it. Blind refers to the scoring: the review was done without knowing which model produced which answer — the published result names them.

2 of the 11 local models delivered nothing through our test harness in this round — for reasons that lie with our setup, not with the models. Those cards are marked DNF like any other, but they are not evidence about those models — the reason is noted on the card itself.

Show task 
Create ONE self-contained HTML file (STRICT LIMIT: max 7000 characters in total — this is a budget on characters, not on lines, so removing line breaks does not help) that simulates a Wireworld circuit on a <canvas>: every cell is empty, conductor, electron head or electron tail, and each step a head becomes a tail, a tail becomes conductor, and a conductor becomes a head exactly when one or two of its eight neighbours are heads. Lay out a closed loop that acts as a clock plus a diode that lets pulses pass in only one direction, seed one electron, and let the pulses circulate. Show the step count and the number of electrons. Smooth requestAnimationFrame animation, NO user input, starts immediately and keeps running (restart with a fresh random instance when finished). No external libraries, no comments needed. Output ONLY the HTML file content, nothing else.

The answers

Local models (Brain cluster) — identical prompt, shuffled order (the sequence is not a ranking)
llama3.1:8bOKFORMAT
Show code
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Wireworld Sim</title>
    <style>
        canvas {
            border: 1px solid black;
        }
    </style>
</head>
<body>
<canvas id="c" width="400" height="400"></canvas>

<script>
const c = document.getElementById('c');
const ctx = c.getContext('2d');

let grid = Array(200).fill(0).map(() => Array(200).fill(0));
let step = 0;
let electrons = 1;

function draw() {
    ctx.fillStyle = 'white';
    ctx.fillRect(0, 0, c.width, c.height);
    for (let y = 0; y < grid.length; y++) {
        for (let x = 0; x < grid[y].length; x++) {
            switch(grid[y][x]) {
                case 1:
                    ctx.fillStyle = 'red';
                    break;
                case 2:
                    ctx.fillStyle = 'blue';
                    break;
                case 3:
                    ctx.fillStyle = 'black';
                    break;
                default:
                    ctx.fillStyle = 'white';
            }
            ctx.fillRect(x * 2, y * 2, 2, 2);
        }
    }
    ctx.font = "14px Arial";
    ctx.textAlign = "left";
    ctx.textBaseline = "top";
    ctx.fillStyle = "black";
    ctx.fillText(`Step: ${step}, Electrons: ${electrons}`, 10, 20);
}

function update() {
    for (let y = 0; y < grid.length; y++) {
        for (let x = 0; x < grid[y].length; x++) {
            let count = 0;
            if (x > 0 && grid[y][x - 1] === 2) count++;
            if (y > 0 && grid[y - 1][x] === 2) count++;
            if (x < grid[y].length - 1 && grid[y][x + 1] === 2) count++;
            if (y < grid.length - 1 && grid[y + 1][x] === 2) count++;
            if (x > 0 && y > 0 && grid[y - 1][x - 1] === 2) count++;
            if (x < grid[y].length - 1 && y < grid.length - 1 && grid[y + 1][x + 1] === 2) count++;
            if (y > 0 && x < grid[y].length - 1 && grid[y - 1][x + 1] === 2) count++;
            if (y < grid.length - 1 && x > 0 && grid[y + 1][x - 1] === 2) count++;
            switch(grid[y][x]) {
                case 1:
                    if (count >= 1 && count <= 2) {
                        grid[y][x] = 3;
                    }
                    break;
                case 2:
                    if (count >= 1 && count <= 2) {
                        grid[y][x] = 1;
                    } else {
                        grid[y][x] = 0;
                    }
                    break;
                case 3:
                    grid[y][x] = 0;
            }
        }
    }
    for (let y = 0; y < grid.length; y++) {
        for (let x = 0; x < grid[y].length; x++) {
            if (grid[y][x] === 2) {
                let count = 0;
                if (x > 0 && grid[y][x - 1] === 3) count++;
                if (y > 0 && grid[y - 1][x] === 3) count++;
                if (x < grid[y].length - 1 && grid[y][x + 1] === 3) count++;
                if (y < grid.length - 1 && grid[y + 1][x] === 3) count++;
                if (x > 0 && y > 0 && grid[y - 1][x - 1] === 3) count++;
                if (x < grid[y].length - 1 && y < grid.length - 1 && grid[y + 1][x + 1] === 3) count++;
                if (y > 0 && x < grid[y].length - 1 && grid[y - 1][x + 1] === 3) count++;
                if (y < grid.length - 1 && x > 0 && grid[y + 1][x - 1] === 3) count++;
                if (count >= 2) {
                    grid[y][x] = 1;
                    electrons++;
                }
            }
        }
    }
}

function animationLoop() {
    step++;
    update();
    draw();
    requestAnimationFrame(animationLoop);
}
animationLoop();

// Initial setup
for (let y = 0; y < grid.length; y++) {
    for (let x = 0; x < grid[y].length; x++) {
        if (y >= 100 && y <= 150 && x >= 100 && x <= 120) { // Clock loop
            grid[y][x] = 2;
        }
        if (y > 50 && y < 60 && x === 50) { // Diode diode tail
            grid[y][x] = 1;
        } else if (y > 50 && y < 60 && x === 170) { // Diode head
            grid[y][x] = 2;
        }
    }
}
grid[100][110] = 3; // Seed electron head

</script>
</body>
</html>
```
qwen3-coder:30bERRBLANKFORMAT
Show code
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Wireworld Simulator</title>
    <style>
        body { background: #111; color: white; font-family: monospace; display: flex; justify-content: center; align-items: flex-start; gap: 20px; padding: 20px; }
        canvas { border: 1px solid #333; background: #000; image-rendering: pixelated; }
        #stats { width: 150px; }
    </style>
</head>
<body>
    <canvas id="wireworld"></canvas>
    <div id="stats">
        Step: <span id="stepCount">0</span><br>
        Electrons: <span id="electronCount">0</span>
    </div>

<script>
    const canvas = document.getElementById('wireworld');
    const ctx = canvas.getContext('2d');

    // Cell Types (Integers for minimal memory/comparison overhead)
    const E = 0, C = 1, T = 2, H = 3; // Empty, Conductor, Tail, Head

    let W = 64; // Width
    let H = 64; // Height
    let grid = [];

    // --- Circuit Definition (Coordinates are [y, x]) ---
    // The circuit is designed to create a small clock loop with an embedded diode.
    const CLOCK_DIODE_PATH = [
        [2, 10], [2, 11], [2, 12], [2, 13], [2, 14],
        [3, 14], [4, 14], [5, 14], [6, 14], [7, 14],
        [7, 13], [7, 12], [7, 11], [7, 10]
    ];

    function initializeGrid() {
        grid = Array.from({ length: H }, () => new Array(W).fill(E));

        // Draw the fixed conductive structure (Clock + Diode)
        for (const [y, x] of CLOCK_DIODE_PATH) {
            if (x >= 0 && x < W && y >= 0 && y < H) {
                grid[y][x] = C;
            }
        }

        // Seed one electron at a starting point near the diode entrance for immediate circulation.
        // This cell will turn into two tails (T=2) in the next step, but we start by setting it as an initial head to kick things off.
        grid[10][3] = H; 
    }

    function countHeads(y, x) {
        let count = 0;
        for (let dy = -1; dy <= 1; dy++) {
            for (let dx = -1; dx <= 1; dx++) {
                if (dx === 0 && dy === 0) continue;
                const ny = y + dy;
                const nx = x + dx;

                if (ny >= 0 && ny < H && nx >= 0 && nx < W) {
                    if (grid[ny][nx] === H) {
                        count++;
                    }
                }
            }
        }
        return count;
    }

    function updateGrid() {
        const newGrid = Array.from({ length: H }, () => new Array(W).fill(E));
        let electronCount = 0;

        for (let y = 0; y < H; y++) {
            for (let x = 0; x < W; x++) {
                const current = grid[y][x];
                let nextCell = E;

                if (current === E) {
                    nextCell = E; // Empty remains empty
                } else if (current === H) {
                    // Head -> Tail
                    newGrid[y][x] = T;
                } else if (current === T) {
                    // Tail -> Conductor
                    newGrid[y][x] = C;
                } else if (current === C) {
                    // Conductor -> ?
                    const neighbors = countHeads(y, x);
                    if (neighbors === 1 || neighbors === 2) {
                        // Becomes Head when 1 or 2 neighbors are heads
                        newGrid[y][x] = H;
                    } else {
                        // Otherwise remains a conductor
                        newGrid[y][x] = C;
                    }
                }

                if (nextCell === H) {
                    electronCount++;
                }
            }
        }
        grid = newGrid;
        return electronCount;
    }

    function draw() {
        const cellSize = 12;
        ctx.clearRect(0, 0, W * cellSize, H * cellSize);

        for (let y = 0; y < H; y++) {
            for (let x = 0; x < W; x++) {
                const cell = grid[y][x];
                let color = '#333'; // Default/Empty

                if (cell === C) {
                    color = '#777'; // Conductor
                } else if (cell === T) {
                    color = '#00AAFF'; // Tail (Blue)
                } else if (cell === H) {
                    color = '#FFFF00'; // Head (Yellow/Electron)
                }
                ctx.fillStyle = color;
                ctx.fillRect(x * cellSize, y * cellSize, cellSize, cellSize);
            }
        }

        // Draw Stats
        document.getElementById('stepCount').textContent = Math.floor(performance.now() / 100); // Using a placeholder step count since it's not explicitly tracked
        let electronCount = 0;
        for (let y = 0; y < H; y++) {
            for (let x = 0; x < W; x++) {
                if (grid[y][x] === H) electronCount++;
            }
        }
        document.getElementById('electronCount').textContent = electronCount;
    }

    let stepCounter = 0;
    function gameLoop() {
        // Update the state first
        const electrons = updateGrid();
        stepCounter++;

        // Draw the new state
        draw();

        // Calculate next frame using requestAnimationFrame for smoothness
        requestAnimationFrame(gameLoop);
    }

    // Start simulation
    initializeGrid();
    gameLoop();
</script>
</body>
</html>
```
qwen3:8bharness
No answer reached us (ERR) — and the reason lies with our setup, not with the model: reasoning consumed the entire token budget and the answer stayed empty; the gateway rejects budgets above 3000 tokens Counted as a did-not-finish, but it is not evidence about this model.
qwen3:14bERRSTATFORMAT
Show code
```html
<!DOCTYPE html>
<html>
<head><title>Wireworld Circuit</title></head>
<body><canvas id="cw"></canvas><script>
const canvas = document.getElementById('cw');
const ctx = canvas.getContext('2d');

// Constants: 0=Empty, 1=Conductor, 2=Head, 3=Tail
const E = 0;
const C = 1;
const H = 2;
const T = 3;

let COLS = 60;
let ROWS = 45;
let grid, newGrid;

// Circuit Configuration (W x H)
const CELL_SIZE = 8;
canvas.width = COLS * CELL_SIZE;
canvas.height = ROWS * CELL_SIZE;

function initialize() {
    grid = Array(ROWS).fill(0).map(() => Array(COLS).fill(E));
    newGrid = Array(ROWS).fill(0).map(() => Array(COLS).fill(E));
}

// Function to safely get cell state, handling boundaries
function getCell(x, y) {
    if (x < 0 || x >= COLS || y < 0 || y >= ROWS) return E;
    return grid[y][x];
}

// Counts how many neighbors are Heads
function countHeads(x, y) {
    let count = 0;
    for (let dy = -1; dy <= 1; dy++) {
        for (let dx = -1; dx <= 1; dx++) {
            if (dx === 0 && dy === 0) continue;
            const nx = x + dx;
            const ny = y + dy;
            const state = getCell(nx, ny);
            if (state === H) count++;
        }
    }
    return count;
}

// Applies Wireworld rules to determine the next state
function updateState(x, y) {
    let currentState = grid[y][x];
    let heads = countHeads(x, y);

    if (currentState === E) return (heads >= 2) ? C : E;
    if (currentState === C) return (heads === 1 || heads === 2) ? H : C;
    if (currentState === H) return T;
    if (currentState === T) return C;

    return currentState; // Should not happen
}

function updateGrid() {
    let electrons = 0;
    for (let y = 0; y < ROWS; y++) {
        for (let x = 0; x < COLS; x++) {
            newGrid[y][x] = updateState(x, y);
            if (grid[y][x] === H) electrons++; // Count heads BEFORE update for accurate display
        }
    }

    // Swap grids
    [grid, newGrid] = [newGrid, grid];
    return electrons;
}

function draw() {
    ctx.fillStyle = '#000';
    ctx.fillRect(0, 0, canvas.width, canvas.height);

    for (let y = 0; y < ROWS; y++) {
        for (let x = 0; x < COLS; x++) {
            const state = grid[y][x];
            ctx.fillStyle = '#ccc'; // Default background/Empty
            if (state === C) ctx.fillStyle = '#333'; // Conductor
            else if (state === H) ctx.fillStyle = 'yellow'; // Head
            else if (state === T) ctx.fillStyle = 'lightgreen'; // Tail
            ctx.fillRect(x * CELL_SIZE, y * CELL_SIZE, CELL_SIZE, CELL_SIZE);
        }
    }

    // Display metrics
    const stepDisplay = document.createElement('div');
    stepDisplay.style.position = 'absolute';
    stepDisplay.style.top = '10px';
    stepDisplay.style.left = '10px';
    document.body.appendChild(stepDisplay);

    let electronCountElement = document.getElementById('e-count');
    if (!electronCountElement) {
        electronCountElement = document.createElement('div');
        electronCountElement.id = 'e-count';
        electronCountElement.style.position = 'absolute';
        electronCountElement.style.top = '40px';
        document.body.appendChild(electronCountElement);
    }

    stepDisplay.innerHTML = `Step: ${stepCounter}<br>Electrons: ${electrons}`;
    electronCountElement.innerHTML = `Electrons: ${electrons}`;
}

let stepCounter = 0;

function loop() {
    const electrons = updateGrid();
    draw();
    stepCounter++;
    requestAnimationFrame(loop);
}

// --- Circuit Initialization ---
function setupCircuit() {
    initialize();

    /*
     * Layout: Clock Loop + Diode
     * Dimensions are scaled to fit 60x45 grid.
     * The loop is roughly centered at (25, 22).
     */
    const X_START = 10;
    const Y_START = 15;
    const LOOP_W = 30;
    const LOOP_H = 15;

    // 1. Build the main square loop (Conductors)
    for (let x = X_START; x < X_START + LOOP_W; x++) {
        grid[Y_START][x] = C; // Top edge
        grid[Y_START + LOOP_H - 1][x] = C; // Bottom edge
    }
    for (let y = Y_START; y < Y_START + LOOP_H; y++) {
        grid[y][X_START] = C; // Left edge
        grid[y][X_START + LOOP_W - 1] = C; // Right edge
    }

    // 2. Create the Diode path (Unidirectional current flow)
    // This section guides the electron pulse from left to right, and only right to left when depleted.
    const DIODE_X = X_START + LOOP_W - 5;
    const DIODE_Y = Y_START + Math.floor(LOOP_H / 2);

    // Path Segment (Ensures current can only enter from the left)
    for (let i = 0; i < 3; i++) {
        grid[DIODE_Y][DIODE_X - i] = C;
        grid[DIODE_Y + 1][DIODE_X - i] = C;
    }
    // Vertical connection to the main loop structure
    for (let j = 0; j < 3; j++) {
        grid[DIODE_Y][DIODE_X + j] = C;
    }

    // 3. Seed one Head electron at a stable entry point
    grid[Y_START + Math.floor(LOOP_H / 2)][X_START + 1] = H;
}

setupCircuit();
loop();

</script></body></html>
```
gemma4:26bharness
No answer reached us (THIN) — and the reason lies with our setup, not with the model: reasoning consumed the entire token budget (3 min 28 s, zero characters of answer); larger budgets are refused by the gateway Counted as a did-not-finish, but it is not evidence about this model.
mistral-small:24bOKFORMAT
Show code
```html
<html>
<head>
<style>
body{margin:0;}
#canvas{border:1px solid black;display:block;margin:auto;background:#fff;}
</style>
</head>
<body onload="start()">
<canvas id="canvas" width="500" height="500"></canvas>
<p style="text-align:center;">Step count: <span id="step">0</span>, Electron count: <span id="electron">1</span></p>
<script>
function randomInt(min, max) {return Math.floor(Math.random() * (max - min + 1)) + min;}
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const cellSize = 8;
const gridWidth = canvas.width / cellSize;
const gridHeight = canvas.height / cellSize;
let stepCount = 0;
let electronCount = 1;

function createGrid() {
    const grid = [];
    for (let y = 0; y < gridHeight; y++) {
        const row = [];
        for (let x = 0; x < gridWidth; x++) {
            row.push(randomInt(0, 3));
        }
        grid.push(row);
    }
    return grid;
}

function drawGrid(grid) {
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    for (let y = 0; y < gridHeight; y++) {
        for (let x = 0; x < gridWidth; x++) {
            const cell = grid[y][x];
            switch(cell){
                case 1: ctx.fillStyle='#ccc'; break;
                case 2: ctx.fillStyle='red'; break;
                case 3: ctx.fillStyle='blue'; break;
                default:ctx.fillStyle='#fff';
            }
            ctx.fillRect(x * cellSize, y * cellSize, cellSize, cellSize);
        }
    }
}

function updateGrid(grid) {
    const newGrid = JSON.parse(JSON.stringify(grid));
	for(let y=0;y<gridHeight;y++){
		for(let x=0;x<gridWidth;x++){
			if(grid[y][x]===2){
				newGrid[y][x]=3;
				electronCount--;
			}else if(grid[y][x]===3)newGrid[y][x]=1;
			else if(grid[y][x]===1){
				let headCount=0;
				for(let dy=-1;dy<=1;dy++){
					for(let dx=-1;dx<=1;dx++){
						if(!(dx===0&&dy===0)){
							const nx=x+dx;
							const ny=y+dy;
							if(nx>=0&&nx<gridWidth&&ny>=0&&ny<gridHeight){
								if(grid[ny][nx]===2)headCount++;
							}
						}
					}
				}
				if(headCount>0&&headCount<=2){newGrid[y][x]=2;electronCount++;}
			}
		}
	}
	return newGrid;
}

function start() {
    let grid = createGrid();
    grid[gridHeight/2|0][gridWidth/2|0] = 1;
    function loop(){
        stepCount++;
	document.getElementById('step').innerText=stepCount;
	document.getElementById('electron').innerText=electronCount;
	drawGrid(grid);
        grid = updateGrid(grid);

	if(stepCount>300){
		 alert("Refresh to see next iteration");
		 window.location.reload()
	}
	requestAnimationFrame(loop);
    }
    loop();
}
</script>
</body>
</html>
```
deepseek-r1:14bBLANKFORMAT
Show code
```html
<div style="display:flex;justify-content:center;align-items:center;height:100vh;margin:0"><canvas id=c width=800 height=600 style="border:1px solid #fff"></canvas></div>

<script>
const c = document.getElementById('c'), ctx = c.getContext('2d');
const w = 80, h = 60;
const size = 10;
let grid = Array(h).fill().map(()=>Array(w).fill()), step=0,count=0;

class Cell {
  constructor(x,y) {this.x=x; this.y=y; this.reset();}
  reset() {this.type='empty'; this.head=false; this.tail=false;}
}
 
function initGrid() {
  for(let y=0;y<h;++y) for(let x=0;x<w;++x) {
    let cell = new Cell(x,y);
    if(y==Math.floor(h/2)) {
      if(x == w-1 || x ==0) cell.type='conductor';
      else if(x%2==0) cell.type='conductor';
      else cell.type='diode'; 
    }
  }
  grid[Math.floor(h/2)][Math.floor(w/2)].type = 'electron';
}

function draw() {
  ctx.clearRect(0,0,c.width,c.height);
  for(let y=0;y<h;++y) {
    for(let x=0;x<w;++x) {
      let cell = grid[x][y];
      switch(cell.type) {
        case 'conductor': ctx.fillStyle='#1a1'; break;
        case 'electron': ctx.fillStyle='#f44'; break;
        case 'tail': ctx.fillStyle='#4af'; break;
        default: continue;
      }
      ctx.fillRect(x*size, y*size, size-1, size-1);
    }
  }
}

function update() {
  let newGrid = Array(w).fill().map(()=>Array(h));
  for(let x=0;x<w;++x) {
    for(let y=0;y<h;++y) {
      let cell = grid[x][y];
      if(cell.type!='electron') return;
      let neighbors = 0, dirs=[[1,0],[0,1],[-1,0],[0,-1],[1,1],[1,-1],[-1,1],[-1,-1]];
      for(let [dx, dy] of dirs) {
        let nx = (x+dx + w)%w;
        let ny = (y+dy + h)%h;
        if(grid[nx][ny].type=='electron') neighbors++;
      }
      if(neighbors==1||neighbors==2) newGrid[x][y] = {type:'conductor', head:false, tail:false};
      else newGrid[x][y] = {type:'empty', head:false, tail:false};
    }
  }
}

function animate() {
  step++; count=0;
  update();
  draw();
  if(step<2000) requestAnimationFrame(animate);
  else {initGrid();step=0;requestAnimationFrame(animate);}
}
</script>
```
qwen3.5:9bOKFORMAT
Show code
```html
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"/><title>Wireworld Simulator</title><style>body{background:#000;display:flex;justify-content:center;align-items:center;height:100vh;margin:0;font-family:monospace}canvas{border:1px solid #333;background:#111}#info{position:absolute;top:20px;right:20px;color:#fff;text-shadow:0 0 5px rgba(0,0,0,0.8);}</style></head><body><canvas id="wireworld"></canvas><div id="info">Step: 0<br>Electrons: 0</div><script>
const canvas = document.getElementById('wireworld');
const ctx = canvas.getContext('2d');
let GRID_SIZE = 75;
let CELL_SIZE = 8;
canvas.width = GRID_SIZE * CELL_SIZE;
canvas.height = GRID_SIZE * CELL_SIZE;

// States: 0=Empty, 1=Conductor, 2=Head, 3=Tail
let grid = [];
let stepCount = 0;

// Helper function for toroidal boundary conditions
function getNeighbor(x, y) {
    const nx = (x + Math.floor(Math.random() * 3) - 1 + GRID_SIZE) % GRID_SIZE;
    const ny = (y + Math.floor(Math.random() * 3) - 1 + GRID_SIZE) % GRID_SIZE;
    return { x: nx, y: ny };
}

function initializeGrid() {
    for (let i = 0; i < GRID_SIZE; i++) {
        grid[i] = new Array(GRID_SIZE).fill(0);
    }
}

// Simple function to set up the required circuit structure
// The loop: A simple square cornering oscillator.
// Diode: Directed flow using geometry (e.g., only allowing passage when conductors are stacked in a specific way, or simply by physical design)
function setupCircuit() {
    const S = 5; // Size of the core circuit region

    // Clock Loop (Square initial ring)
    for (let i = 0; i < S; i++) {
        grid[S][i] = 1;
        grid[S + S - 1 - i][S] = 1;
    }
    for (let j = 1; j < S; j++) {
        grid[j][S + S - 1] = 1;
        grid[S - 1 - j][S - 1] = 1;
    }

    // Diode structure: A simple path segment that forces flow direction (e.g., top to bottom)
    for (let i = S + 2; i < S + 3*S / 4; i++) {
        grid[S][i] = 1; // Horizontal segment
    }
    for (let j = S + 2; j < S + 3*S / 4; j++) {
        if (j !== S) grid[j][S + 3 * S / 4 - 1] = 1; // Vertical connection point
    }


    // Seed electron: Place an initial head/tail to start the flow.
    grid[S+2][S]=2; // Initial Head
}

function countNeighbors(x, y) {
    let count = 0;
    for (let dx = -1; dx <= 1; dx++) {
        for (let dy = -1; dy <= 1; dy++) {
            if (dx === 0 && dy === 0) continue;
            const nx = (x + dx + GRID_SIZE) % GRID_SIZE;
            const ny = (y + dy + GRID_SIZE) % GRID_SIZE;
            // Check for Heads only, as that is the trigger condition
            if (grid[nx][ny] === 2) {
                count++;
            }
        }
    }
    return count;
}

function updateGrid() {
    const newGrid = JSON.parse(JSON.stringify(grid));
    let totalElectrons = 0;

    for (let x = 0; x < GRID_SIZE; x++) {
        for (let y = 0; y < GRID_SIZE; y++) {
            const state = grid[x][y];
            let newState = state;

            if (state === 2) { // Head -> Tail
                newState = 3;
            } else if (state === 3) { // Tail -> Conductor
                newState = 1;
            } else if (state === 1) { // Conductor -> ?
                const neighbors = countNeighbors(x, y);
                if (neighbors === 1 || neighbors === 2) {
                    newState = 2; // Becomes Head
                }
            }
            newGrid[x][y] = newState;

            if (state === 2) totalElectrons++;
        }
    }
    grid = newGrid;
}

function draw() {
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    for (let x = 0; x < GRID_SIZE; x++) {
        for (let y = 0; y < GRID_SIZE; y++) {
            const state = grid[x][y];
            ctx.fillStyle = '#111'; // Background/Empty default

            if (state === 0) {
                // Empty: Darkest background color
                ctx.fillStyle = '#111';
            } else if (state === 1) {
                // Conductor: Weak glow
                ctx.fillStyle = '#444';
            } else if (state === 2) {
                // Head: Bright yellow/electron core
                ctx.fillStyle = '#FFFF00';
            } else if (state === 3) {
                // Tail: Orange/fading electron body
                ctx.fillStyle = '#FFAA00';
            }

            ctx.fillRect(x * CELL_SIZE, y * CELL_SIZE, CELL_SIZE, CELL_SIZE);
        }
    }
}

function updateInfo() {
    let eCount = 0;
    for (let x = 0; x < GRID_SIZE; x++) {
        for (let y = 0; y < GRID_SIZE; y++) {
            if (grid[x][y] === 2) eCount++;
        }
    }
    document.getElementById('info').innerHTML = `Step: ${stepCount}<br>Electrons: ${eCount}`;
}

function animate() {
    updateGrid();
    draw();
    updateInfo();
    stepCount++;
    requestAnimationFrame(animate);
}

// --- Initialization and Start ---
initializeGrid();
setupCircuit(); 
animate();
</script></body></html>
```
qwq:32bSTATLIM
Show code
<think>

Okay, I need to create a self-contained HTML file that simulates a Wireworld circuit using a canvas. Let me start by recalling the Wireworld rules. Each cell can be in four states: empty (0), conductor (1), electron head (2), or electron tail (3). The rules are:

1. Head becomes a tail.
2. Tail becomes conductor.
3. Conductor becomes a head if exactly one or two of its eight neighbors are heads; else stays conductor.
4. Empty stays empty.

The task is to create a circuit with a closed loop acting as a clock and a diode that allows pulses in one direction. The simulation should start automatically with a single electron, display step count and electron count, use smooth animation via requestAnimationFrame, and restart with a new random instance after finishing.

First, the HTML structure. I'll need a canvas element and some divs for displaying step and electron count. The script will handle the logic.

Starting with the canvas setup. The size should be manageable but allow the diode and loop. Maybe 200x200 pixels? But the exact size will depend on the circuit layout. Wait, the user says to lay out a closed loop plus a diode. Let me think about the circuit design.

A diode in wireworld allows pulses to pass in one direction. The simplest diode could be a conductor with two heads in a specific configuration. But to make a one-way path, the diode might need a specific layout. Alternatively, maybe use a NOT gate? Hmm, perhaps a standard diode setup where a pulse can only go through in one direction because of the conductor arrangement.

The loop should have a starting point where the electron is seeded. The diode is placed such that when the pulse goes one way, it's blocked when trying to go back. Maybe place the diode within the loop so that the pulse circulates and the diode ensures directionality.

Now, the grid representation. Let's use a 2D array for the cells. The size needs to be big enough. Maybe 30x30? Let me see. Let's go with 30 rows and 30 columns. The canvas can be scaled accordingly.

The initial setup: the loop. Let's create a square loop, say starting at (5,5) going around. Then, place the diode within the loop. For example, a diode might be made by having three conductors in a T-shape, but I need to recall the exact configuration.

Wait, perhaps the diode is made by having two conductors adjacent in a way that when a pulse comes from one direction, it can pass through, but the reverse is blocked. Alternatively, a standard diode in wireworld uses a specific pattern. Let me think of the diode configuration: one possible setup is a conductor with another conductor above it, and then the path branches. Maybe I need to look up a common diode pattern.

Alternatively, a diode can be a single cell conductor with two heads, but that might not work. Maybe a better approach is to have a structure where when a pulse approaches from direction A, the diode allows it, but when it comes from direction B, it doesn't. Let me try to design the diode.

Alternatively, here's a common diode setup from wireworld: a conductor placed such that when a head comes from a certain direction, the next step allows the pulse to continue, but in reverse, it doesn't. For example, placing a conductor in a way that when the electron comes from the left, it can propagate through, but not from the right.

Alternatively, the diode can be created with a three-cell conductor line and a perpendicular conductor. Let me think of coordinates. Maybe place a straight path, and the diode is a T-junction where one branch blocks the reverse pulse.

Alternatively, here's an approach: the loop could be a rectangle, and the diode is placed at a corner. The diode configuration might involve a T-junction where the path branches, but only allows flow in one direction.

Alternatively, perhaps the diode uses a three-step configuration where a conductor is placed at positions that when a pulse comes in a direction, it can proceed, but not the other way.

Alternatively, maybe the diode is a simple one like three conductors arranged in a line with a perpendicular conductor at one end. Hmm, perhaps I should look up a standard diode configuration for Wireworld.

Wait, since the user wants a diode that allows pulses in only one direction, perhaps the diode is a single cell conductor with a neighboring conductor. Let me think of an example. For instance, a diode can be constructed by placing two conductors diagonally so that a pulse can pass only in one direction. 

Alternatively, maybe the diode is a structure where when the pulse comes from above, it can proceed, but when coming from below, it doesn't. For example, placing a conductor in a way that when a head is present, the next state allows the tail to propagate, but in reverse, it might hit a tail or conductor that blocks.

Alternatively, considering that conductors become heads when they have one or two head neighbors. So, to create a diode, maybe arrange conductors so that in one direction, the pulse can continue, but when reversed, the conditions don't allow the necessary head conversion.

Perhaps a standard diode is a horizontal line of three conductors with a vertical conductor at one end. Let me try to imagine:

Suppose the main loop is a rectangle. Let's say the loop is a 5x5 square, but with a diode placed on one side. The diode could be placed such that when the pulse goes clockwise around the loop, it passes through the diode, but if it tries to go counter-clockwise, it doesn't.

Alternatively, the diode could be a T-junction where the pulse can only go in one direction. For example, a vertical line with a horizontal branch going to the right. The diode would allow pulses from the vertical to go right, but not left.

Alternatively, here's a possible setup for a diode: 

The diode can be formed by a conductor placed in such a way that when a pulse comes from one side, it can continue, but when it comes from the other, it hits a configuration that doesn't create the required heads.

Alternatively, here's a common diode setup in Wireworld:

Let me try to recall, a one-way diode can be made by placing two conductors diagonally. For example, if the pulse is moving along a path, and there's a conductor at a diagonal position which allows the pulse to continue when coming from one direction but not the other.

Alternatively, here's a possible configuration:

Imagine a straight path going east. The diode is placed so that when a pulse comes from the west, it can continue east, but not vice versa. To do this, maybe have a conductor one cell north and south of the eastern direction, arranged so that the heads can propagate in one way but not the other.

Alternatively, perhaps place a conductor in a T-shape where the vertical line can only propagate in one direction.

This is getting a bit stuck. Maybe I need to look for a common wireworld diode configuration. Since I can't access external resources, I'll have to think from what I remember.

Wait, in wireworld, a diode can be a simple straight line with a conductor placed such that when a head arrives, it can create the needed heads in the next step. Alternatively, a diode can be a single conductor cell with a neighboring conductor.

Alternatively, a diode can be arranged as follows: a conductor at (x,y), with another conductor at (x+1,y) and (x,y-1). Not sure.

Alternatively, here's a possible diode configuration: imagine a vertical path, and at the point of the diode, there's a horizontal conductor that goes one way but blocks the other. 

Alternatively, maybe the simplest diode is a three-cell line of conductors. Let me think: if the conductor is in a straight line, then a pulse would just continue. To block in one direction, perhaps add an extra conductor at a T-junction. 

Alternatively, here's a possible setup for a diode:

The diode consists of a straight path with a T-junction where the horizontal path is blocked in the reverse direction. For example, the main path goes east. The diode is placed so that when a pulse comes from the west, it can turn into the T-junction's vertical path, but when coming from the east, it can't. 

Alternatively, the diode could be a configuration where a conductor is placed such that in one direction, the required number of head neighbors is met, but in reverse, it isn't.

Hmm, perhaps I need to think of the exact rules again.

When a conductor cell becomes a head if exactly one or two of its eight neighbors are heads. So, in the diode, when the pulse is going forward, the neighboring heads would trigger the conductor to become a head, but reversing, the arrangement won't have enough heads to create the next head.

Alternatively, here's a possible approach: the diode is a straight line with a conductor placed in such a way that when the pulse is moving to the right, the next step creates the necessary heads, but moving to the left, it doesn't.

Alternatively, here's another idea: the diode could be a three-cell segment where two cells form a diagonal, allowing the pulse to proceed in one direction but not the other.

Alternatively, perhaps the diode is simply a T-junction with a conductor in a certain position. Maybe the diode is a single cell placed such that it can only be activated from one side.

Alternatively, let me think of the following configuration for the diode:

Suppose the main loop is a rectangle. Let's say the loop is a rectangle of conductors. The diode is placed on one side. For example, the loop is a rectangle with a small detour where the diode is placed. The diode could be a three-cell structure where two conductors are in a way that allows one direction.

Alternatively, perhaps the simplest is to make a straight path for the loop and add a diode in series. Let's start by defining the grid.

Let me start by defining the grid size. Let's choose 30x30 for the grid to have enough space.

First, the loop: a rectangle. Let's say from (5,5) to (25,25). The loop would be the perimeter with conductors, but with a diode placed somewhere. Alternatively, maybe a smaller loop.

Perhaps the loop is a square of 10x10, so from 5 to 15 in both x and y. The diode is placed in the middle of the loop.

Alternatively, the loop could be a rectangle with a diode on the top side. Let me think of coordinates:

Let's set the loop as a rectangle with corners at (5,5) to (25,5) to (25,20) to (5,20) back to (5,5). Wait, but that might be too big. Alternatively, a smaller loop.

Alternatively, let's define a loop as follows:

The main loop is a rectangle with conductors all around, forming a closed path. The diode is placed in one of the sides, say the top side. The diode allows pulses to go clockwise but not counter-clockwise.

The diode configuration on the top side could be such that at a point, the conductor path includes a diode structure. Let me think of coordinates.

Suppose the loop is a rectangle from (10,10) to (20,10) (east-west side), then up to (20,20), then west back to (10,20), then down. Wait, but that's a rectangle. The diode could be placed on the east side at (20,15), forming a T-junction that only allows pulses from west to east.

Alternatively, perhaps the loop is a square with a diode placed on one side. The diode could be a T-junction where the vertical path is blocked unless coming from one direction.

Alternatively, here's a possible way:

The loop is a rectangle with a straight path from left to right, but at a certain point, the path has a diode: a T-junction where the main path continues, but the diode allows pulses to go straight but blocks reverse.

Alternatively, here's a possible diode setup for Wireworld: a horizontal line of conductors with a vertical conductor going up at one point. The diode allows pulses coming from the left to go up, but not the other way.

Wait, perhaps the diode is simply a single conductor cell placed diagonally from the path, so that when a pulse comes from one direction, it can trigger a head in the next step, but not vice versa.

Alternatively, let me consider that the diode's function is that when a pulse approaches from one direction, it can continue through the diode, but in the reverse direction, it cannot. 

Suppose the diode is placed along the path so that the pulse must go through a specific configuration. For example, imagine the main path is horizontal, and the diode is a vertical segment that can only be traversed in one direction.

Alternatively, maybe the diode is a three-cell line of conductors with an extra conductor at a diagonal position.

Alternatively, here's a possible approach: the diode can be formed by a conductor placed such that when the pulse comes from one direction, the conductor has two head neighbors in the next step (thus becoming a head itself), but from the opposite direction, it doesn't.

Okay, perhaps I should just define the coordinates for the diode as part of the grid setup and see if it works.

Let me outline the plan step by step:

1. Create a 2D array for the grid. Let's say 30x30.

2. Initialize the grid with all cells as empty except for the conductors forming the loop and diode.

3. The loop is a rectangle, say with borders on the edges, making a closed path.

4. Place the diode within this loop.

5. Seed an electron head at one point to start the pulse.

6. Implement the Wireworld rules in the step function.

7. Set up canvas drawing and animation with requestAnimationFrame.

8. Track step count and electron count.

9. After some steps, perhaps the pulse stabilizes or loops indefinitely? Wait, the user says to let the pulses circulate, so it should loop forever, but the problem mentions "when finished" to restart. Maybe the circuit is designed so that after some steps, the pulse has gone around the loop and the system returns to initial state, then restart?

Alternatively, maybe the diode creates a situation where the pulse can only go one way, so it circulates indefinitely, but the restart condition is when the step count reaches a certain number? Or perhaps the problem says to restart with a new random instance when finished, but I'm not sure what "finished" means here. Maybe the circuit completes a cycle, but since it's a closed loop with a diode, it should keep going forever. Perhaps the user wants it to run indefinitely, but the restart is triggered after a certain number of steps, but the user instruction isn't clear. Let me re-read the problem.

The problem says: "Restart with a fresh random instance when finished". So "finished" might mean when the circuit reaches a stable state where no more changes occur, but in a loop with a diode, it should keep cycling. Alternatively, maybe the circuit is designed to eventually stop (like some oscillators), but the user wants it to loop. Hmm, perhaps the "finished" is when the step count reaches a maximum, but the user doesn't specify. Maybe the code should let it run indefinitely, but the restart is triggered after a certain number of steps for demonstration purposes. Alternatively, perhaps the initial setup has an electron that eventually completes a cycle and the system resets. Hmm, not sure. Maybe the problem just wants the simulation to run indefinitely, and the restart is a requirement when it's finished, but I might have to set a counter to restart after, say, 1000 steps. Alternatively, perhaps the circuit is designed so that after some steps, it reaches a state that can be considered as "finished".

Alternatively, perhaps the problem just wants the circuit to run indefinitely, and the restart when finished is part of the requirements regardless. Maybe the code includes a counter that after a certain number of steps (like 1000), it restarts by creating a new grid.

Alternatively, perhaps "finished" means when the electron(s) have completed a full cycle and the system is back to the initial state? But that might not be straightforward. 

For now, I'll proceed to code the simulation, and handle the restart by restarting after a certain number of steps, say 1000 steps. 

Now, implementing the grid:

First, the grid dimensions. Let's pick a 30x30 grid for the canvas. The canvas can be scaled to fit, using CSS.

The main loop will be a rectangle. Let's define the loop as a rectangle from (5 to 25) in both x and y, but forming a closed path. Wait, perhaps better to make the loop smaller. Let me try:

Let's have a rectangular loop with width and height of 10 units. Let's place it from (10,10) to (20,20). The loop is the perimeter of this square. So the conductors are along the outer edges.

But then where to place the diode? Maybe replace one of the sides with a diode structure.

Alternatively, the loop could be a rectangle with a diode on the bottom side. The diode is placed so that it allows pulses to move clockwise but not counter-clockwise.

Let me define the loop as follows:

Conductors form a rectangle with corners at (10,10), (20,10), (20,20), (10,20). The loop is the perimeter of this rectangle, so the conductors are along the edges. The diode is placed on the bottom side (the south edge) between (15,20) and (16,20). The diode structure here would allow pulses to go clockwise but not counter-clockwise.

Wait, but how to create the diode here. Maybe at the point (15,20), replace the normal path with a diode configuration.

Alternatively, let's try to define the diode as a T-junction. Suppose the main loop path is going from left to right along the top side (y=10). At some point, the path turns downward. The diode is placed on the east side so that it can only be traversed in one direction.

Alternatively, here's a possible approach for the diode:

Suppose the main path is along the top (y=10) from x=10 to x=20. Then turns down at x=20 to y=20, then left along the bottom (y=20) back to x=10, then up. The diode is placed on the bottom side (y=20) between x=15 and x=16. The diode is a T-junction that allows the pulse to go west (left) but not east (right). Thus, when the pulse goes clockwise around the loop, it can go west on the bottom side, but if it goes counter-clockwise, it would have to go east on the bottom side, which the diode blocks.

To create this T-junction diode, at position (15,20), instead of a straight path, there's a conductor that can only be activated from the west direction.

Wait, perhaps the diode is formed by adding a conductor cell diagonally, so that when the pulse comes from the west (left), it can trigger the next head, but from the east (right), it cannot.

Alternatively, perhaps the diode is a three-cell structure where two conductors are arranged so that they can only be traversed in one direction.

Alternatively, here's a simple way: place a conductor at (15,20), but have a T-junction where the path turns upward. Wait, I'm getting stuck here. Maybe it's better to code a simple diode structure.

Alternatively, here's a common diode configuration in Wireworld: a straight path with a T-junction where the vertical path is one way. The diode allows electrons to go straight through but not turn into the vertical path. Wait, maybe not. Alternatively, a T-junction where the vertical path only allows electrons coming from one direction.

Alternatively, here's a known diode design: 

A diode can be made with a two-cell structure. For example, a conductor followed by a cell that can only be activated by two electrons from one side. 

Alternatively, here's a diode configuration from the Wireworld cellular automaton examples: a straight path with a T-junction where the vertical path is only one cell, which can be traversed in one direction.

Alternatively, maybe the diode can be a three-cell line with a gap. 

Perhaps it's better to look up a simple diode design for Wireworld.

Upon recalling, a simple diode can be constructed as follows: a straight path with a conductor cell and a blockage that can only be traversed in one direction. 

Alternatively, here's a common one-way diode in Wireworld:

A three-cell conductor line with a second conductor placed at a diagonal position, allowing the pulse to go forward but not back.

Alternatively, here's a configuration for a diode:

Imagine the main path going from west to east. To make a diode that allows only west-east direction:

Place conductors at (x, y), (x+1, y), (x+2, y). Then, at (x+1, y+1), place a conductor. This forms a T-junction where the pulse can go forward but not back.

Wait, I think I need to look up the exact configuration. 

Alternatively, here's a design from Wikipedia: 

A simple diode can be made with a three-cell horizontal line of conductors (cells 1-3), and a fourth conductor placed diagonally above the third cell (cell 4). Electrons can move from 1 to 2 to 3 to 4, but cannot reverse.

Wait, maybe this can work. 

Suppose the main path is horizontal going east. To create a diode that allows eastward movement but not westward:

Place conductors at (x, y) [cell 1], (x+1, y) [cell 2], (x+2, y) [cell 3], and (x+2, y+1) [cell 4]. 

This way, when electrons come from the west:

They move from cell1 to cell2 to cell3 (head at cell3), then to cell4 (which becomes a head?), but then the next step would be to turn back? Not sure.

Alternatively, perhaps the standard diode is built with four cells arranged in a L-shape.

Alternatively, here's a known diode from Wireworld:

The minimal diode is 4 cells:

Cells (0,0), (1,0), (2,0), (2,1). 

So when a pulse comes from the west (left) to the east (right), it can traverse through the cells, but coming from the east cannot.

Let me see:

Suppose we have conductors at (0,0), (1,0), (2,0), (2,1). 

A pulse coming from the west (left) would go to (0,0) [conductor], then (1,0) [conductor], then (2,0) [conductor], then (2,1) [conductor]. 

The next step, the pulse at (2,0) becomes an electron head, which can activate its neighbors.

Alternatively, perhaps this forms a one-way passage.

Assuming this configuration works, I can use this as the diode in my grid.

So, integrating this into the loop:

Suppose the main loop has a diode on one of its edges. Let's choose the bottom edge of the loop at (15,20). 

So the diode is placed such that the main path goes through this diode. 

Let me outline the grid setup step by step.

First, define the grid size as 30x30.

Initialize all cells as 0 (empty).

Then, define the loop path.

Let's set the loop as a rectangle from (10,10) to (20,20). The perimeter of this rectangle is the conductors.

So, the conductors are:

For the top edge: x from 10 to 20, y=10.

Right edge: y from 11 to 19, x=20.

Bottom edge: x from 10 to 20, y=20.

Left edge: y from 11 to 19, x=10.

So, all those positions are set to 1 (conductor).

Now, to place the diode on the bottom edge (y=20), let's replace a section of the bottom edge with the diode structure.

The bottom edge runs from x=10 to 20 at y=20.

Let’s place the diode at the center, say from x=15 to x=17.

Instead of having conductors at x=15,16,17 on y=20, we'll replace that with the diode's four cells.

The diode requires four cells as per the design above:

Cells (15,20), (16,20), (17,20), (17,21). 

Wait, but (17,21) is outside the main loop's bottom edge. Maybe it's okay.

Thus, the diode will replace the conductors at x=15,16,17 on y=20, and add (17,21).

So:

Set (15,20) to conductor (1),

(16,20) to conductor,

(17,20) to conductor,

(17,21) to conductor.

This forms a diode that allows pulses to go from west to east through the diode, but not east to west.

Thus, when the pulse is going clockwise around the loop, it will traverse the diode eastward, but if it tried to go west on the bottom edge (counter-clockwise), it would be blocked.

The rest of the bottom edge remains as conductors except the section 15-17 is replaced by the diode.

Wait, but the original bottom edge had conductors from x=10 to x=20 at y=20. To insert the diode at x=15 to x=17, we need to set those three cells as part of the diode, and also include (17,21). 

So, the bottom edge from x=10 to x=14 remains conductors (y=20), then the diode starts at x=15, then after x=17, the bottom edge continues from x=18 to x=20.

Thus, after inserting the diode, the bottom edge has a gap at x=15-17 that is replaced by the diode's structure.

This setup should create a one-way path through the diode, allowing only clockwise movement.

Now, to seed an electron head at a starting point. Let's choose the top edge, say at position (11,10). Set that cell to 2 (electron head).

Now, the simulation should start with the electron moving east along the top edge, go around the loop, through the diode on the bottom edge (eastward), and continue clockwise. If it tries to go the other way, it's blocked by the diode.

Okay, now translating this setup into code.

Now, since the user asked to "create" this, probably in code that sets up the grid, but perhaps they just want a description. The question says "Create" but in the context of a coding problem, perhaps it's to write the code for setting up the grid.

Assuming that, here's an outline.

First, define the grid size:

WIDTH = 30

HEIGHT = 30

grid = [[0 for _ in range(WIDTH)] for _ in range(HEIGHT)]

Then, draw the loop:

# Draw top edge
for x in range(10, 21):
    grid[10][x] = 1

# Draw right edge
for y in range(11, 20):
    grid[y][20] = 1

# Draw bottom edge
for x in range(10, 21):
    grid[20][x] = 1

# Draw left edge
for y in range(11, 20):
    grid[y][10] = 1

# Now, replace part of the bottom edge with the diode
# Remove the conductors at x=15,16,17 on the bottom edge (y=20)
# and replace with the diode's cells

for x in [15,16,17]:
    grid[20][x] = 0

# Add diode's four cells
grid[20][15] = 1  # part of diode
grid[20][16] = 1  # part of diode
grid[20][17] = 1  # part of diode
grid[21][17] = 1  # the fourth cell of diode

# Now, add the starting electron head at (11,10)
grid[10][11] = 2

Wait, but the initial electron head is at (10,11) (assuming rows are y and columns are x). In Python, grid[y][x], so the cell (y,x) = (10,11) is correct.

Now, to make sure the rest of the bottom edge is intact:

The original bottom edge from x=10 to 20 at y=20 is set to conductor, but we overwrote x=15-17 to 0, then set them again to 1 for the diode. So it's okay.

Also, the part of the bottom edge from x=10 to 14 remains as 1 (conductors), and x=18 to 20 also remain as 1.

Thus, the bottom edge has the diode from x=15-17, and continues elsewhere.

This should work.

Therefore, the code above creates the desired setup.

Alternatively, perhaps the user wants the code in a specific language, like Python? The question didn't specify, but given the initial instruction is to "Create", and in the context of a coding problem, likely Python.

Hence, here's the code:

But let me recheck the coordinates to ensure correctness.

Wait, the diode is placed at (20,15), (20,16), (20,17), and (21,17). 

The standard diode uses cells (0,0), (1,0), (2,0), (2,1). 

So in this case, the diode is placed starting at (20,15) as (0,0), then (20,16) (1,0), (20,17) (2,0), and (21,17) (2,1). 

This should allow an electron coming from the west (left) to pass through.

So an electron moving east would go through these cells correctly.

Testing mentally:

An electron head at (20,14) (west of the diode):

Next step, it becomes an electron tail (state 3), and its neighbors are checked.

The cell east (20,15) is a conductor (state 1). So that cell will become an electron head (state 2).

Thus, the electron moves east through the diode.

If an electron were trying to go west through the diode, say from (20,18) trying to go west past the diode, the diode should block it.

In that case, the electron would have to move west through the diode's cells, but due to the diode's structure, it can't.

Thus, the diode enforces one-way.

Okay, this setup should work.

Now, the code as written would create this.

Hence, the answer is the code above, but let me write it properly formatted.
deepseek-r1:32bERRBLANKFORMAT
Show code
```html
<!DOCTYPE html>
<html><head><title>Wireworld Clock with Diode</title></head><body style="background:#1a1a1a;display:flex;flex-direction:column;align-items:center;padding:0;margin:0"><canvas id=c width=800 height=600 style="border:2px solid #333;background:#000"></canvas><div id=i style="position:fixed;top:10;left:10;color:#fff;font-family:monospace"></div><script>
const c=document.getElementById('c'),ctx=c.getContext('2d'),cellSize=8,width=100,height=75,states={empty:0,conductor:1,head:2,tail:3};
let cells=[],step=0,eCount=0;

function init(){
    cells=[];
    for(let y=0;y<height;y++){
        let row=[];cells.push(row);
        for(let x=0;x<width;x++){
            row[x]=states.empty;
        }
    }
    
    // Create a torus-like loop
    const loopWidth=25,loopHeight=20,startX=(width-loopWidth)/2,startY=(height-loopHeight)/2;
    for(let y=startY;y<startY+loopHeight;y++){
        for(let x=startX;x<startX+loopWidth;x++){
            if(x===startX||x===startX+loopWidth-1||y===startY||y===startY+loopHeight-1){
                cells[y][x]=states.conductor;
            }
        }
    }

    // Add diode
    const diodeSize=5,diodeStartX=startX-10,diodeStartY=startY+loopHeight/2-diodeSize/2;
    for(let y=diodeStartY;y<diodeStartY+diodeSize;y++){
        for(let x=diodeStartX;x<diodeStartX+diodeSize;x++){
            cells[y][x]=states.conductor;
        }
    }

    // Seed electrons
    cells[startY+loopHeight/2-1][startX]=states.head;
    cells[startY+loopHeight/2][startX]=states.head;
}

function update(){
    let nextCells=cells.map(row=>row.map(c=>c));
    
    for(let y=0;y<height;y++){
        for(let x=0;x<width;x++){
            if(cells[y][x]==states.head){
                nextCells[y][x]=states.tail;
                eCount--;
            }else if(cells[y][x]==states.tail){
                nextCells[y][x]=states.conductor;
                eCount++;
            }
        }
    }

    for(let y=0;y<height;y++){
        for(let x=0;x<width;x++){
            if(nextCells[y][x]==states.conductor){
                let neighbors=0;
                for(let dy=-1;dy<=1;dy++){
                    for(let dx=-1;dx<=1;dx++){
                        if(dy==0&&dx==0) continue;
                        let ny=(y+dy+height)%height,nx=(x+dx+width)%width;
                        if(cells[ny][nx]==states.head){
                            neighbors++;
                        }
                    }
                }
                if(neighbors==1||neighbors==2){
                    nextCells[y][x]=states.head;
                    eCount++;
                }
            }
        }
    }

    cells=nextCells;
    step++;
}

function draw(){
    ctx.fillStyle='#000';
    ctx.fillRect(0,0,c.width,c.height);
    
    for(let y=0;y<height;y++){
        for(let x=0;x<width;x++){
            switch(cells[y][x]){
                case states.head:
                    ctx.fillStyle='#ff1111';
                    break;
                case states.tail:
                    ctx.fillStyle='#ffa500';
                    break;
                case states.conductor:
                    ctx.fillStyle='#444';
                    break;
                default:
                    ctx.fillStyle='#000';
            }
            ctx.fillRect(x*cellSize,y*cellSize,cellSize-1,cellSize-1);
        }
    }

    document.getElementById('i').textContent=`Step: ${step}\nElectrons: ${eCount}`;
}

function animate(){
    update();
    draw();
    if(step<1000) requestAnimationFrame(animate);
    else init();
}

init();
animate();
</script></body></html>
```
command-r:35bERRBLANKLIMFORMAT
Show code
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Wireworld Circuit</title>
    <style>
        body { margin:0; }
        canvas { border:1px solid black; }
    </style>
</head>
<body>
    <canvas id="circuit"></canvas>

    <script>
        const CELL_EMPTY = 0, CELL_CONDUCTOR = 1, CELL_HEAD = 2, CELL_TAIL = 3;

        let canvas, ctx, width, height, cellSize, stepCountEl, electronCountEl, stepCount = 0, electronCount = 0, running = false,
            circuit = [], diodeStartX = null, diodeStartY = null;

        function init() {
            canvas = document.getElementById('circuit');
            ctx = canvas.getContext('2d');

            width = height = 16 * (8 + 3); // 16 cells plus 3 pixel gap each side
            cellSize = Math.min(width, height) / width;
            canvas.width = width * cellSize;
            canvas.height = height * cellSize;

            stepCountEl = document.createElement('div');
            electronCountEl = document.createElement('div');
            document.body.appendChild(stepCountEl);
            document.body.appendChild(electronCountEl);
        }

        function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);

            for (let x = 0; x < circuit.length; ++x)
                for (let y = 0; y < circuit[x].length; ++y)
                    switch (circuit[x][y]) {
                        case CELL_EMPTY:
                            break;

                        default:
                            ctx.fillStyle = '#' + (CELL_HEAD === circuit[x][y] ? 'FF0' : '00F');
                            ctx.fillRect(
                                ((x - 1) * width / circuit.length + 3) * cellSize,
                                ((y - 1) * height / circuit[x].length + 3) * cellSize,
                                Math.max((width / circuit.length - 6) * cellSize, 0),
                                Math.max((height / circuit[x].length - 6) * cellSize, 0));
                            break;
                    }

            ++stepCount;
            stepCountEl.innerText = 'Step: ' + stepCount;
            electronCountEl.innerText = 'Electrons: ' + electronCount;
        }

        function nextStep() {
            let neighbourHeadCounts = new Uint8Array(circuit.length * circuit[0].length);

            for (let x = 1; x < circuit.length - 1; ++x)
                for (let y = 1; y < circuit[x].length - 1; ++y) {
                    let cellIndex = x * circuit[0].length + y,
                        neighbourIndices = [
                            circuit[x-1][y], circuit[x+1][y],
                            circuit[x][y-1], circuit[x][y+1],
                            circuit[x-1][y-1], circuit[x+1][y-1],
                            circuit[x-1][y+1], circuit[x+1][y+1]
                        ];

                    neighbourHeadCounts[cellIndex] = 0;
                    for (const neighbour of neighbourIndices)
                        if (CELL_HEAD === neighbour) ++neighbourHeadCounts[cellIndex];
                }

            const isDiodeStartCell = diodeStartX !== null && diodeStartY !== null;
            let newCircuit = [];
            for (let x = 1; x < circuit.length - 1; ++x) {
                if (!newCircuit.length) newCircuit.push([]);

                if (isDiodeStartCell && x === diodeStartX + 3 || !isDiodeStartCell && x === diodeStartX)
                    for (let y = 1; y < circuit[x].length - 2; ++y)
                        newCircuit[x-1].push(CELL_EMPTY);
                else if (isDiodeStartCell && x === diodeStartX + 5 || !isDiodeStartCell && x === diodeStartX + 4)
                    for (let y = 1; y < circuit[x].length - 2; ++y)
                        newCircuit[x+1].push(CELL_EMPTY);
                else {
                    let headCountThreshold = isDiodeStartCell && x >= diodeStartX + 3 && x <= diodeStartX + 5 ? 0 : 1;

                    for (let y = 1; y < circuit[x].length - 1; ++y)
                        newCircuit[x-1].push(
                            neighbourHeadCounts[(x-1)*circuit[0].length+y] >= headCountThreshold
                                && CELL_CONDUCTOR === circuit[x][y] ? CELL_HEAD : (
                                    neighbourHeadCounts[(x-1)*circuit[0].length+y] < 2 ||
                                    neighbourHeadCounts[(x-1)*circuit[0].length+y] > 2
                                        || CELL_EMPTY === circuit[x][y] ? cell[x][y] :
                                    ((CELL_HEAD === circuit[x][y]) ? CELL_TAIL : CELL_CONDUCTOR)
                                )
                        );
                }
            }

            for (let x = 1; x < newCircuit.length - 1; ++x) {
                if (!newCircuit[x].length) newCircuit[x] = [];

                const isDiodeStartCellX = isDiodeStartCell && x === diodeStartX + 3 || !isDiodeStartCell && x === diodeStartX,
                    isDiodeEndCellX = isDiodeStartCell && x === diodeStartX + 5 || !isDiodeStartCell && x === diodeStartX + 4;

                if (isDiodeStartCellX) {
                    for (let y = 1; y < newCircuit[x].length - 2; ++y)
                        newCircuit[x][y] = CELL_CONDUCTOR;
                } else if (!isDiodeEndCellX && isDiodeStartCell || isDiodeEndCellX && !isDiodeStartCell) {
                    for (let y = 1; y < circuit[x].length - 2; ++y)
                        newCircuit[x][y] = CELL_EMPTY;
                } else if (!isDiodeStartCell && x !== diodeStartX + 4 || isDiodeStartCell && x === diodeStartX + 5) {
                    for (let y = 1; y < circuit[x].length - 2; ++y)
                        newCircuit[x][y] = CELL_CONDUCTOR;
                } else {
                    let headCountThreshold = isDiodeStartCell ? 0 : 1,
                        tailCountThreshold = isDiodeStartCell && x >= diodeStartX + 3 && x <= diodeStartX + 5 ? 0 : 4;

                    for (let y = 1; y < circuit[x].length - 1; ++y) {
                        let newCell =
                            neighbourHeadCounts[(x-1)*circuit[0].length+y] >= headCountThreshold
                                && CELL_CONDUCTOR === newCircuit[x][y] ? CELL_HEAD : (
                                    neighbourHeadCounts[(x-1)*circuit[0].length+y] < 2 ||
                                    neighbourHeadCounts[(x-1)*circuit[0].length+y] > 2
                                        || CELL_EMPTY === circuit[x][y] ? newCircuit[x][y] :
                                    ((CELL_HEAD === newCircuit[x][y]) && --electronCount >= tailCountThreshold) ? CELL_TAIL : (
                                        CELL_CONDUCTOR === newCircuit[x][y] && ++electronCount <= 4 ? CELL_HEAD : null
                                    )
                                );

                        if (newCell !== newCircuit[x][y]) {
                            electronCount = Math.min(Math.max(electronCount, 0), 8);

                            if (!newCell) newCell = CELL_EMPTY;
                            else if (!electronCount && CELL_TAIL === newCell) electronCount = -1;

                            newCircuit[x][y] = newCell;
                        }
                    }
                }
            }

            circuit = newCircuit;
        }

        init();
        draw();
        nextStep();

        function step() {
            requestAnimationFrame(step);

            if (!running) return;

            nextStep();
            draw();
        }
        setTimeout(step, 0);
    </script>
</body>
</html>
```
Outside the Brain cluster — same task, same character budget, collected through their own tooling (response times not comparable)
GPT-5.5 (Codex)OKMINIFIED
Show code
<!doctype html><html><head><meta charset=utf-8><title>Wireworld</title><style>html,body{margin:0;height:100%;background:#05070b;color:#dce7ff;font:14px system-ui}canvas{display:block;width:100vw;height:100vh}.hud{position:fixed;left:12px;top:10px;background:#0009;padding:8px 10px;border:1px solid #234;border-radius:6px}</style></head><body><canvas id=c></canvas><div class=hud>step <b id=s>0</b> electrons <b id=e>0</b></div><script>
const C=c.getContext("2d"),S=s,E=e,W=90,H=58,N=W*H,EMP=0,CON=1,HE=2,TA=3;
let a,b,st,seed,scale,ox,oy,last=0,acc=0,done=0;
function I(x,y){return y*W+x}
function line(x1,y1,x2,y2){let dx=Math.sign(x2-x1),dy=Math.sign(y2-y1),x=x1,y=y1;for(;;){a[I(x,y)]=CON;if(x==x2&&y==y2)break;x+=dx;y+=dy}}
function loop(x,y,w,h){line(x,y,x+w,y);line(x+w,y,x+w,y+h);line(x+w,y+h,x,y+h);line(x,y+h,x,y)}
function diode(x,y,d){let q=d>0?1:-1;line(x-8*q,y,x-2*q,y);line(x+2*q,y,x+8*q,y);a[I(x-1*q,y-1)]=CON;a[I(x,y-1)]=CON;a[I(x+1*q,y-1)]=CON;a[I(x-1*q,y+1)]=CON;a[I(x,y+1)]=CON}
function fresh(){a=new Uint8Array(N);b=new Uint8Array(N);loop(12,10,50,34);line(62,27,74,27);line(74,27,74,15);line(74,15,62,15);diode(68,15,-1);for(let k=22;k<38;k++)a[I(k,10)]=CON;seed=I(13,10);a[seed]=HE;st=0;done=0}
function fit(){c.width=innerWidth*devicePixelRatio;c.height=innerHeight*devicePixelRatio;scale=Math.max(4,Math.floor(Math.min(c.width/W,c.height/H)));ox=(c.width-W*scale)/2;oy=(c.height-H*scale)/2}
function step(){let n=0;for(let y=0;y<H;y++)for(let x=0;x<W;x++){let p=I(x,y),v=a[p],h=0;if(v==HE)b[p]=TA;else if(v==TA)b[p]=CON;else if(v==CON){for(let yy=-1;yy<2;yy++)for(let xx=-1;xx<2;xx++)if((xx||yy)&&a[I((x+xx+W)%W,(y+yy+H)%H)]==HE)h++;b[p]=h==1||h==2?HE:CON}else b[p]=EMP;if(b[p]==HE)n++}let t=a;a=b;b=t;st++;S.textContent=st;E.textContent=n;if(!n||st>2800)done++;else done=0;if(done>20)fresh()}
function draw(){C.setTransform(1,0,0,1,0,0);C.fillStyle="#05070b";C.fillRect(0,0,c.width,c.height);C.setTransform(scale,0,0,scale,ox,oy);for(let y=0;y<H;y++)for(let x=0;x<W;x++){let v=a[I(x,y)];if(v){C.fillStyle=v==1?"#d29b49":v==2?"#4de8ff":"#ff455f";C.fillRect(x+.08,y+.08,.84,.84)}}}
function go(t){acc+=t-last;last=t;while(acc>45){step();acc-=45}draw();requestAnimationFrame(go)}
onresize=fit;fresh();fit();requestAnimationFrame(go);
</script></body></html>
Claude Sonnet 5OK
Show code
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1">
<title>Wireworld</title>
<style>
html,body{margin:0;background:#05070a;overflow:hidden;height:100%}
canvas{display:block;margin:auto}
</style></head><body>
<canvas id="c"></canvas>
<script>
const EMPTY=0,HEAD=1,TAIL=2,COND=3;
const cv=document.getElementById('c'),ctx=cv.getContext('2d');
const CS=16;
let W,GH,H,dx,g,g2,stepN,acc=0,last=0;
function idx(x,y){return y*W+x}
function reset(){
  W=16+Math.floor(Math.random()*10);
  H=8+Math.floor(Math.random()*6);
  dx=2+Math.floor(Math.random()*(W-4));
  GH=H+1;
  g=new Uint8Array(W*GH);
  for(let x=0;x<W;x++){g[idx(x,0)]=COND;g[idx(x,H-1)]=COND}
  for(let y=0;y<H;y++){g[idx(0,y)]=COND;g[idx(W-1,y)]=COND}
  g[idx(dx,H-1)]=EMPTY;
  g[idx(dx,H-2)]=COND;
  g[idx(dx,H)]=COND;
  g[idx(1,0)]=TAIL;
  g[idx(2,0)]=HEAD;
  g2=new Uint8Array(W*GH);
  stepN=0;
  cv.width=W*CS;cv.height=GH*CS;
}
function tick(){
  for(let y=0;y<GH;y++)for(let x=0;x<W;x++){
    const i=idx(x,y),c=g[i];
    if(c===EMPTY){g2[i]=EMPTY;continue}
    if(c===HEAD){g2[i]=TAIL;continue}
    if(c===TAIL){g2[i]=COND;continue}
    let n=0;
    for(let dy=-1;dy<=1;dy++)for(let dxx=-1;dxx<=1;dxx++){
      if(dy===0&&dxx===0)continue;
      const nx=x+dxx,ny=y+dy;
      if(nx<0||ny<0||nx>=W||ny>=GH)continue;
      if(g[idx(nx,ny)]===HEAD)n++;
    }
    g2[i]=(n===1||n===2)?HEAD:COND;
  }
  const t=g;g=g2;g2=t;
  stepN++;
  let active=0;
  for(let i=0;i<g.length;i++)if(g[i]===HEAD||g[i]===TAIL)active++;
  if(stepN>900||active===0)reset();
}
function draw(){
  ctx.fillStyle='#05070a';
  ctx.fillRect(0,0,cv.width,cv.height);
  let eCount=0;
  for(let y=0;y<GH;y++)for(let x=0;x<W;x++){
    const c=g[idx(x,y)];
    if(c===EMPTY)continue;
    if(c===HEAD){eCount++;ctx.fillStyle='#eafcff';ctx.shadowColor='#7be8ff';ctx.shadowBlur=10}
    else if(c===TAIL){ctx.fillStyle='#2266dd';ctx.shadowBlur=0}
    else{ctx.fillStyle='#c9791f';ctx.shadowBlur=0}
    ctx.fillRect(x*CS,y*CS,CS-2,CS-2);
    ctx.shadowBlur=0;
  }
  ctx.fillStyle='rgba(0,0,0,.55)';
  ctx.fillRect(4,4,220,44);
  ctx.fillStyle='#fff';
  ctx.font='14px monospace';
  ctx.fillText('Step: '+stepN,12,22);
  ctx.fillText('Electrons: '+eCount,12,40);
}
function loop(ts){
  if(!last)last=ts;
  const dt=ts-last;last=ts;
  acc+=dt;
  while(acc>=60){tick();acc-=60}
  draw();
  requestAnimationFrame(loop);
}
reset();
requestAnimationFrame(loop);
</script>
</body></html>
Claude Haiku 4.5OK
Show code
<!DOCTYPE html>
<html>
<head><meta charset="utf-8"><meta name="viewport" content="width=device-width"><style>body{margin:0;background:#000;display:flex;justify-content:center;align-items:center;height:100vh}canvas{border:1px solid #333}#i{position:absolute;top:10px;left:10px;color:#fff;font-family:monospace;font-size:12px}</style></head>
<body>
<canvas id="c"></canvas>
<div id="i">Steps: <span id="s">0</span> | Electrons: <span id="e">0</span></div>
<script>
const c=document.getElementById('c'),ctx=c.getContext('2d');
c.width=500;c.height=500;
const sz=2;const w=250,h=250;let grid=new Uint8Array(w*h),steps=0;
for(let x=10;x<100;x++)grid[50*w+x]=1;grid[50*w+50]=2;
for(let y=50;y<100;y++)grid[y*w+100]=1;grid[75*w+100]=2;
for(let x=100;x<150;x++)grid[100*w+x]=1;
for(let y=50;y<100;y++)grid[y*w+50]=1;
function f(){const next=new Uint8Array(w*h);for(let y=0;y<h;y++){for(let x=0;x<w;x++){const idx=y*w+x,c=grid[idx];if(c===0)next[idx]=0;else if(c===2)next[idx]=1;else if(c===1){let cnt=0;for(let dy=-1;dy<=1;dy++){for(let dx=-1;dx<=1;dx++){if(dx===0&&dy===0)continue;const nx=(x+dx+w)%w,ny=(y+dy+h)%h;if(grid[ny*w+nx]===2)cnt++;}}
next[idx]=(cnt===1||cnt===2)?2:1;}}}
grid=next;steps++;
ctx.fillStyle='#000';ctx.fillRect(0,0,c.width,c.height);let ecnt=0;for(let y=0;y<h;y++){for(let x=0;x<w;x++){const c=grid[y*w+x];if(c===1)ctx.fillStyle='#0f0';else if(c===2){ctx.fillStyle='#f00';ecnt++;}else continue;ctx.fillRect(x*sz,y*sz,sz,sz);}}
document.getElementById('s').textContent=steps;document.getElementById('e').textContent=ecnt;requestAnimationFrame(f);}
f();
</script>
</body>
</html>
Results at a glance— every model in this round with score, response time and status.

Who wrote what

ModelBlind scoreLatencyStatus
llama3.1:8b —110.0 sOK
qwen3-coder:30b —26.9 sOK
qwen3:8b ——harness
qwen3:14b —54.0 sOK
gemma4:26b ——harness
mistral-small:24b —159.4 sOK
deepseek-r1:14b —123.7 sOK
qwen3.5:9b —52.3 sOK
qwq:32b —246.1 sOK
deepseek-r1:32b —49.9 sOK
command-r:35b —78.0 sOK