Reaction-diffusion · llama-3.1-8b-instruct
No runnable output Cost / run $0.0006 Runtime 5.8s
Prompt for this run
Build a Gray-Scott reaction-diffusion simulation on a canvas. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Maintain two chemical concentration fields, U and V, with diffusion and the Gray-Scott reaction, feed, and removal terms. Evolve these fields rather than displaying a prerecorded pattern. - Use a square simulation grid with wrapping boundaries. Choose stable time and spatial steps with parameters Du = 0.16, Dv = 0.08, feed = 0.035, and kill = 0.062 in simulation units. - Initially fill the field with U = 1 and V = 0, then seed a small central region with V and reduced U. Map concentrations to contrasting colors so evolving organic patterns are visible. - Clicking or dragging adds V and reduces U near the pointer. Provide Pause/Resume and Reset; Reset restores the initial fields and seed. - Choose Canvas 2D or WebGL, and bound grid resolution and work per frame to keep interaction responsive. Verify: Sample early field evolution, then seed a separate region with the pointer. Check that the added region affects the following frames. Pause and resume, then reset and compare the restored central seed with the initial scene.
This one-shot run produced no runnable artifact.
Error: agent produced no index.html
The transcript below shows what the model did — read it to see why the one shot fell short.
TAKE IT TO CODE
This run produced no artifact — reuse the prompt with a different model or your own pi-agent run.
RUN
METRICS
Transcript · 7 messages
Build a Gray-Scott reaction-diffusion simulation on a canvas. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Maintain two chemical concentration fields, U and V, with diffusion and the Gray-Scott reaction, feed, and removal terms. Evolve these fields rather than displaying a prerecorded pattern. - Use a square simulation grid with wrapping boundaries. Choose stable time and spatial steps with parameters Du = 0.16, Dv = 0.08, feed = 0.035, and kill = 0.062 in simulation units. - Initially fill the field with U = 1 and V = 0, then seed a small central region with V and reduced U. Map concentrations to contrasting colors so evolving organic patterns are visible. - Clicking or dragging adds V and reduces U near the pointer. Provide Pause/Resume and Reset; Reset restores the initial fields and seed. - Choose Canvas 2D or WebGL, and bound grid resolution and work per frame to keep interaction responsive. Verify: Sample early field evolution, then seed a separate region with the pointer. Check that the added region affects the following frames. Pause and resume, then reset and compare the restored central seed with the initial scene.
<write>{ "path": "index.html", "content": "<html><head><title>Gray-Scott Simulation</title><style>body { margin: 0; } canvas { border: 1px solid black; }</style></head><body><canvas id='canvas' width='800' height='600'></canvas><div id='controls'><button id='pause'>Pause</button><button id='reset'>Reset</button></div><script>let canvas = document.getElementById('canvas');let ctx = canvas.getContext('2d');let gridW = 80;let gridH = 60;let cellW = canvas.width / gridW;let cellH = canvas.height / gridH;let Du = 0.16;let Dv = 0.08;let feed = 0.035;let kill = 0.062;let grid = Array.from({length: gridH}, () => Array.from({length: gridW}, () => ({u: 1, v: 0, d1: -Du, d2: -Dv, f: feed, k: kill}));let running = true;let paused = false;let mouse = {x: 0, y: 0};function init(){ctx.fillStyle = 'lightgray';ctx.fillRect(0, 0, canvas.width, canvas.height);}function getMousePos(e){let rect = canvas.getBoundingClientRect();mouse.x = e.clientX - rect.left * cellW;mouse.y = e.clientY - rect.top * cellH;}document.addEventListener('mousedown', getMousePos);document.addEventListener('mousemove', getMousePos);document.addEventListener('mouseup', getMousePos);document.getElementById('pause').addEventListener('click', togglePause);document.getElementById('reset').addEventListener('click', reset);function togglePause(){paused = !paused;}function reset(){running = true;paused = false;for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {grid[i][j].u = 1;grid[i][j].v = 0;}}drawGrid();}function drawGrid(){for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {ctx.fillStyle = grid[i][j].u < 0.01 ? '#0000ff' : '#ff0000';ctx.fillRect(j * cellW, i * cellH, cellW, cellH);ctx.fillStyle = 'black';ctx.font = '10px Arial';ctx.textAlign = 'center';ctx.textBaseline = 'middle';ctx.fillText(i + '/' + gridH + ' ' + j + '/' + gridW, j * cellW + cellW / 2, i * cellH + cellH / 2);}}function update(){if (running && !paused) {for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {let d1 = grid[i][j].d1 + (grid[(i + gridH - 1) % gridH][j].u - 2 * grid[i][j].u + grid[(i + gridH + 1) % gridH][j].u) * grid[i][j].d1 + grid[i][j].f * grid[i][j].v * grid[i][j].u * grid[i][j].k;let d2 = grid[i][j].d2 + (grid[i][(j + gridW - 1) % gridW].v - 2 * grid[i][j].v + grid[i][(j + gridW + 1) % gridW].v) * grid[i][j].d2 + grid[i][j].f * grid[i][j].v * grid[i][j].u * grid[i][j].k;grid[i][j].u += d1;grid[i][j].v += d2;}}}update();grid[(Math.floor(mouse.y / cellH) + gridH) % gridH][Math.floor(mouse.x / cellW)] = {u: 0.5, v: 0.2};drawGrid();requestAnimationFrame(update);}init();</script></body></html>" }</write> <bash>{ "command": "mkdir images && cd images", "stdout": "" }</bash> <bash>{ "command": "cd .. && npm install browser" }</bash> <browser>{ "action": "inspect", "x": 0, "y": 0 }</browser>
The output file index.html has not been written, or is empty. Write the complete app to index.html in the current directory now. Use the remaining time to verify it, then finish. The original 15-minute deadline still applies.
<write>{ "path": "index.html", "content": "<html><head><title>Gray-Scott Simulation</title><style>body { margin: 0; } canvas { border: 1px solid black; }</style></head><body><canvas id='canvas' width='800' height='600'></canvas><div id='controls'><button id='pause'>Pause</button><button id='reset'>Reset</button></div><script>let canvas = document.getElementById('canvas');let ctx = canvas.getContext('2d');let gridW = 80;let gridH = 60;let cellW = canvas.width / gridW;let cellH = canvas.height / gridH;let Du = 0.16;let Dv = 0.08;let feed = 0.035;let kill = 0.062;let grid = Array.from({length: gridH}, () => Array.from({length: gridW}, () => ({u: 1, v: 0, d1: -Du, d2: -Dv, f: feed, k: kill}));let running = true;let paused = false;let mouse = {x: 0, y: 0};function init(){ctx.fillStyle = 'lightgray';ctx.fillRect(0, 0, canvas.width, canvas.height);}function getMousePos(e){let rect = canvas.getBoundingClientRect();mouse.x = e.clientX - rect.left * cellW;mouse.y = e.clientY - rect.top * cellH;}document.addEventListener('mousedown', getMousePos);document.addEventListener('mousemove', getMousePos);document.addEventListener('mouseup', getMousePos);document.getElementById('pause').addEventListener('click', togglePause);document.getElementById('reset').addEventListener('click', reset);function togglePause(){paused = !paused;}function reset(){running = true;paused = false;for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {grid[i][j].u = 1;grid[i][j].v = 0;}}drawGrid();}function drawGrid(){for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {ctx.fillStyle = grid[i][j].u < 0.01 ? '#0000ff' : '#ff0000';ctx.fillRect(j * cellW, i * cellH, cellW, cellH);ctx.fillStyle = 'black';ctx.font = '10px Arial';ctx.textAlign = 'center';ctx.textBaseline = 'middle';ctx.fillText(i + '/' + gridH + ' ' + j + '/' + gridW, j * cellW + cellW / 2, i * cellH + cellH / 2);}}function update(){if (running && !paused) {for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {let d1 = grid[i][j].d1 + (grid[(i + gridH - 1) % gridH][j].u - 2 * grid[i][j].u + grid[(i + gridH + 1) % gridH][j].u) * grid[i][j].d1 + grid[i][j].f * grid[i][j].v * grid[i][j].u * grid[i][j].k;let d2 = grid[i][j].d2 + (grid[i][(j + gridW - 1) % gridW].v - 2 * grid[i][j].v + grid[i][(j + gridW + 1) % gridW].v) * grid[i][j].d2 + grid[i][j].f * grid[i][j].v * grid[i][j].u * grid[i][j].k;grid[i][j].u += d1;grid[i][j].v += d2;}}}update();function animate() {if (running) {update();grid[Math.floor(mouse.y / cellH)][Math.floor(mouse.x / cellW)] = {u: 0.5, v: 0.2};drawGrid();}requestAnimationFrame(animate);}animate();</script></body></html>" }</write>
The output file index.html has not been written, or is empty. Write the complete app to index.html in the current directory now. Use the remaining time to verify it, then finish. The original 15-minute deadline still applies.
<write>{ "path": "index.html", "content": "<html><head><title>Gray-Scott Simulation</title><style>body { margin: 0; } canvas { border: 1px solid black; }</style></head><body><canvas id='canvas' width='800' height='600'></canvas><div id='controls'><button id='pause'>Pause</button><button id='reset'>Reset</button></div><meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\"/><meta charset=\"UTF-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"><script>let canvas = document.getElementById('canvas');let ctx = canvas.getContext('2d');let gridW = 80;let gridH = 60;let cellW = canvas.width / gridW;let cellH = canvas.height / gridH;let Du = 0.16;let Dv = 0.08;let feed = 0.035;let kill = 0.062;let grid = Array.from({length: gridH}, () => Array.from({length: gridW}, () => ({u: 1, v: 0, d1: -Du, d2: -Dv, f: feed, k: kill}));let running = true;let paused = false;let mouse = {x: 0, y: 0};function init(){ctx.fillStyle = 'lightgray';ctx.fillRect(0, 0, canvas.width, canvas.height);}function getMousePos(e){let rect = canvas.getBoundingClientRect();mouse.x = e.clientX - rect.left * cellW;mouse.y = e.clientY - rect.top * cellH;}document.addEventListener('mousedown', getMousePos);document.addEventListener('mousemove', getMousePos);document.addEventListener('mouseup', getMousePos);document.getElementById('pause').addEventListener('click', togglePause);document.getElementById('reset').addEventListener('click', reset);function togglePause(){paused = !paused;}function reset(){running = true;paused = false;for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {grid[i][j].u = 1;grid[i][j].v = 0;}}drawGrid();}function drawGrid(){for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {ctx.fillStyle = grid[i][j].u < 0.01 ? '#0000ff' : '#ff0000';ctx.fillRect(j * cellW, i * cellH, cellW, cellH);ctx.fillStyle = 'black';ctx.font = '10px Arial';ctx.textAlign = 'center';ctx.textBaseline = 'middle';ctx.fillText(i + '/' + gridH + ' ' + j + '/' + gridW, j * cellW + cellW / 2, i * cellH + cellH / 2);}}function update(){if (running && !paused) {for (let i = 0; i < gridH; i++) {for (let j = 0; j < gridW; j++) {let d1 = grid[i][j].d1 + (grid[(i + gridH - 1) % gridH][j].u - 2 * grid[i][j].u + grid[(i + gridH + 1) % gridH][j].u) * grid[i][j].d1 + grid[i][j].f * grid[i][j].v * grid[i][j].u * grid[i][j].k;let d2 = grid[i][j].d2 + (grid[i][(j + gridW - 1) % gridW].v - 2 * grid[i][j].v + grid[i][(j + gridW + 1) % gridW].v) * grid[i][j].d2 + grid[i][j].f * grid[i][j].v * grid[i][j].u * grid[i][j].k;grid[i][j].u += d1;grid[i][j].v += d2;}}}update();function animate() {if (running) {update();grid[Math.floor(mouse.y / cellH)][Math.floor(mouse.x / cellW)] = {u: 0.5, v: 0.2};drawGrid();grid[Math.floor(mouse.y / cellH)][Math.floor(mouse.x / cellW)] = {u: 1, v: 0};requestAnimationFrame(animate);}}animate();</script></body></html>" }</write>