Synthwave sunset · qwen3-vl-30b-a3b-instruct
Output generated Cost / run $0.0243 Runtime 267.1s
Prompt for this run
Build an animated synthwave landscape on a full-screen 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: - Draw a glowing gradient sun broken by horizontal scanline bands, a starfield, and a perspective neon grid extending from the foreground to a horizon. - Animate the grid toward the viewer to suggest forward travel. Move the sun slowly down toward the horizon while keeping the composition visible. - Below the horizon, include a stylized reflection of the sun's colors on the ground plane, visually distinct from a second sun in the sky. - Use a loop of 10 to 20 seconds that repeats without a distracting reset jump. Provide Pause/Resume and Restart controls. - Use procedural drawing and colors only. Fit the canvas to the viewport; choose the palette and decorative details freely. Verify: Sample several moments to inspect grid travel, sun movement, and the reflected colors below the horizon. Pause and resume to check animation control, then use Restart and compare the starting composition.
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
METRICS
Transcript · 33 messages
Build an animated synthwave landscape on a full-screen 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: - Draw a glowing gradient sun broken by horizontal scanline bands, a starfield, and a perspective neon grid extending from the foreground to a horizon. - Animate the grid toward the viewer to suggest forward travel. Move the sun slowly down toward the horizon while keeping the composition visible. - Below the horizon, include a stylized reflection of the sun's colors on the ground plane, visually distinct from a second sun in the sky. - Use a loop of 10 to 20 seconds that repeats without a distracting reset jump. Provide Pause/Resume and Restart controls. - Use procedural drawing and colors only. Fit the canvas to the viewport; choose the palette and decorative details freely. Verify: Sample several moments to inspect grid travel, sun movement, and the reflected colors below the horizon. Pause and resume to check animation control, then use Restart and compare the starting composition.
I'll create a full-screen animated synthwave landscape with a glowing sun, starfield, and perspective neon grid. The animation will include pause/resume and restart controls.
index.html (10490 bytes)Successfully wrote to index.html
I've created a full-screen animated synthwave landscape with the requested features. Let me check the behavior:
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","error: Identifier 'reflectionGradient' has already been declared"],"dom":"Pause\nRestart","images":"attached"}
I see there's an issue with the code. The console shows an error about "reflectionGradient" being declared multiple times. Let me fix this by renaming the variable to avoid the conflict:
{"path":"index.html","edits":[{"oldText":"const reflectionGradient = ctx.createRadialGradient(centerX, sunReflectionY, 0, centerX, sunReflecNo changes made to index.html. The replacements produced identical content.
The edits didn't work because the text was already correct. Let me fix the variable name issue by changing the variable name in the code:
{"path":"index.html","edits":[{"oldText":"const reflectionGradient = ctx.createRadialGradient(centerX, sunReflectionY, 0, centerX, sunReflecSuccessfully replaced 2 block(s) in index.html.
Now let me reload the page to check if the issue is resolved:
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","error: reflectionGradient is not defined"],"dom":"Pause\nRestart","images":"attached"}
I see the issue. I need to fix the variable name in the drawing code as well. Let me update the code to use the correct variable name for the reflection gradient:
{"path":"index.html","edits":[{"oldText":"ctx.fillStyle = reflectionGradient;","newText":"ctx.fillStyle = reflectionGradientSun;"}]}Found 2 occurrences of the text in index.html. The text must be unique. Please provide more context to make it unique.
I need to be more specific with the text to replace. Let me find the exact line and replace it:
{"path":"index.html","edits":[{"oldText":"ctx.fillStyle = reflectionGradient;","newText":"ctx.fillStyle = reflectionGradientSun;"}]}Found 2 occurrences of the text in index.html. The text must be unique. Please provide more context to make it unique.
I need to be more specific. Let me look at the code around the issue and replace it with the correct context:
{"path":"index.html","edits":[{"oldText":"ctx.beginPath();\n ctx.arc(centerX, sunReflectionY, sunReflectionRadius, 0, Math.PI * 2);\n Successfully replaced 1 block(s) in index.html.
Now let me reload the page to check if the issue is resolved:
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","error: reflectionGradient is not defined"],"dom":"Pause\nRestart","images":"attached"}
I see the issue. I need to fix the variable name in the ground reflection gradient as well. Let me update that:
{"path":"index.html","edits":[{"oldText":"ctx.fillStyle = reflectionGradient;","newText":"ctx.fillStyle = reflectionGradientGround;"}]}Successfully replaced 1 block(s) in index.html.
Now let me reload the
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","error: reflectionGradient is not defined"],"dom":"Pause\nRestart","images":"attached"}
I see the issue. The variable name is still not being recognized. Let me check the code again and make sure I'm replacing the correct instances. Let me try a different approach by replacing all instances of the variable name with a unique one, then fixing the references:
{"path":"index.html","edits":[{"oldText":"const reflectionGradient = ctx.createLinearGradient(0, reflectionY, 0, reflectionY + reflectionHeiCould not find the exact text in index.html. The old text must match exactly including all whitespace and newlines.
I need to be more precise with the text. Let me check the exact text and replace it with the correct context:
{"path":"index.html","edits":[{"oldText":"const reflectionGradient = ctx.createLinearGradient(0, reflectionY, 0, reflectionY + reflectionHeiCould not find the exact text in index.html. The old text must match exactly including all whitespace and newlines.
I need to be more precise. Let me check the exact text in the file and make the replacement with the correct context. Let me first read the file to see the exact content around the issue:
{"path":"index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Synthwave Landscape</title> <style> body, html { margin: 0; padding: 0; overflow: hidden; width: 100%; height: 100%; background: #000; display: flex; justify-content: center; align-items: center; } canvas { display: block; } .controls { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; gap: 10px; } button { padding: 10px 20px; border: none; border-radius: 5px; background: #00ff9d; color: #000; font-weight: bold; cursor: pointer; transition: all 0.3s; } button:hover { transform: scale(1.1); } button:active { transform: scale(0.95); } </style> </head> <body> <canvas id="canvas"></canvas> <div class="controls"> <button id="pauseBtn">Pause</button> <button id="restartBtn">Restart</button> </div> <script> // Get canvas and context const canvas = document.getElementById('canvas'); const ctx = canvas.getContext('2d'); // Set canvas to full screen function resizeCanvas() { canvas.width = window.innerWidth; canvas.height = window.innerHeight; } // Initialize resizeCanvas(); window.addEventListener('resize', resizeCanvas); // Animation variables let isAnimating = true; let animationId; let time = 0; let sunY = -100; // Start above the canvas // Colors const colors = { sun: ['#ff00ff', '#ff00cc', '#ff0099', '#ff0066', '#ff0033'], stars: ['#ffffff', '#00ffff', '#00ff99', '#00ff66'], grid: ['#00ff9d', '#00ffcc', '#00ff66', '#00ff33'], ground: ['#000033', '#000044', '#000055'], horizon: '#000033' }; // Star field const stars = []; const starCount = 200; // Initialize stars for (let i = 0; i < starCount; i++) { stars.push({ x: Math.random() * canvas.width, y: Math.random() * canvas.height, size: Math.random() * 2 + 1, brightness: Math.random() * 0.8 + 0.2 }); } // Grid parameters const gridLines = []; const gridCount = 20; // Initialize grid lines for (let i = 0; i < gridCount; i++) { gridLines.push({ y: (i / gridCount) * canvas.height, x: 0, width: canvas.width, speed: Math.random() * 2 + 1 }); } // Draw sun function drawSun() { const centerX = canvas.width / 2; const centerY = sunY; const radius = 100; // Create radial gradient const gradient = ctx.createRadialGradient(centerX, centerY, 0, centerX, centerY, radius); gradient.addColorStop(0, colors.sun[0]); gradient.addColorStop(0.2, colors.sun[1]); gradient.addColorStop(0.5, colors.sun[2]); gradient.addColorStop(0.8, colors.sun[3]); gradient.addColorStop(1, colors.sun[4]); ctx.beginPath(); ctx.arc(centerX, centerY, radius, 0, Math.PI * 2); ctx.fillStyle = gradient; ctx.fill(); // Add scanline effect for (let i = 0; i < 10; i++) { const scanlineY = centerY - radius + i * 20; if (scanlineY > 0 && scanlineY < canvas.height) { const scanlineGradient = ctx.createLinearGradient(0, scanlineY, canvas.width, scanlineY); scanlineGradient.addColorStop(0, 'rgba(255, 0, 255, 0.3)'); scanlineGradient.addColorStop(0.5, 'rgba(255, 0, 255, 0.7)'); scanlineGradient.addColorStop(1, 'rgba(255, 0, 255, 0.3)'); ctx.beginPath(); ctx.moveTo(0, scanlineY); ctx.lineTo(canvas.width, scanlineY); ctx.strokeStyle = scanlineGradient; ctx.lineWidth = 2; ctx.stroke(); } } } // Draw star field function drawStars() { stars.forEach(star => { ctx.beginPath(); ctx.arc(star.x, star.y, star.size, 0, Math.PI * 2); ctx.fillStyle = `rgba(255, 255, 255, ${star.brightness})`; ctx.fill(); }); } // Draw perspective grid function drawGrid() { const centerX = canvas.width / 2; const centerY = canvas.height * 0.7; // Horizon line // Draw grid lines moving toward the viewer gridLines.forEach(line => { const y = line.y + line.speed * Math.sin(time * 0.1) * 5; const x = line.x + line.speed * Math.sin(time * 0.1) * 5; // Create a gradient for the grid line const gradient = ctx.createLinearGradient(0, y, canvas.width, y); gradient.addColorStop(0, colors.grid[0]); gradient.addColorStop(0.5, colors.grid[1]); gradient.addColorStop(1, colors.grid[2]); ctx.beginPath(); ctx.moveTo(0, y); ctx.lineTo(canvas.width, y); ctx.strokeStyle = gradient; ctx.lineWidth = 2; ctx.stroke(); // Add glow effect ctx.shadowColor = colors.grid[0]; ctx.shadowBlur = 10; ctx.stroke(); ctx.shadowBlur = 0; }); } // Draw ground reflection function drawGroundReflection() { const centerX = canvas.width / 2; const reflectionY = canvas.height * 0.7; // Horizon const reflectionHeight = canvas.height * 0.3; // Ground area // Create reflection gradient const reflectionGradientGround = ctx.createLinearGradient(0, reflectionY, 0, reflectionY + reflectionHeight); reflectionGradient.addColorStop(0, colors.ground[0]); reflectionGradient.addColorStop(0.3, colors.ground[1]); reflectionGradient.addColorStop(1, colors.ground[2]); ctx.fillStyle = reflectionGradientGround; ctx.fillRect(0, reflectionY, canvas.width, reflectionHeight); // Draw reflection of sun const sunReflectionY = reflectionY + (sunY - reflectionY) * 0.5; // Reflect sun position const sunReflectionRadius = 50; // Smaller reflection const reflectionGradientSun = ctx.createRadialGradient(centerX, sunReflectionY, 0, centerX, sunReflectionY, sunReflectionRadius); reflectionGradient.addColorStop(0, colors.sun[0]); reflectionGradient.addColorStop(0.2, colors.sun[1]); reflectionGradient.addColorStop(0.5, colors.sun[2]); reflectionGradient.addColorStop(0.8, colors.sun[3]); reflectionGradient.addColorStop(1, colors.sun[4]); ctx.beginPath(); ctx.arc(centerX, sunReflectionY, sunReflectionRadius, 0, Math.PI * 2); ctx.fillStyle = reflectionGradientSun; ctx.fill(); // Add scanline effect to reflection for (let i = 0; i < 5; i++) { const scanlineY = sunReflectionY - sunReflectionRadius + i * 10; if (scanlineY > reflectionY && scanlineY < reflectionY + reflectionHeight) { const scanlineGradient = ctx.createLinearGradient(0, scanlineY, canvas.width, scanlineY); scanlineGradient.addColorStop(0, 'rgba(255, 0, 255, 0.2)'); scanlineGradient.addColorStop(0.5, 'rgba(255, 0, 255, 0.6)'); scanlineGradient.addColorStop(1, 'rgba(255, 0, 255, 0.2)'); ctx.beginPath(); ctx.moveTo(0, scanlineY); ctx.lineTo(canvas.width, scanlineY); ctx.strokeStyle = scanlineGradient; ctx.lineWidth = 1; ctx.stroke(); } } } // Animation loop function animate() { if (!isAnimating) return; // Clear canvas ctx.clearRect(0, 0, canvas.width, canvas.height); // Update time time += 0.01; // Update sun position sunY += 0.5; if (sunY > canvas.height + 100) { sunY = -100; // Reset sun position } // Update stars stars.forEach(star => { star.y += 0.1; if (star.y > canvas.height) { star.y = 0; star.x = Math.random() * canvas.width; } }); // Update grid gridLines.forEach(line => { line.y += line.speed; if (line.y > canvas.height) { line.y = 0; } }); // Draw everything drawSun(); drawStars(); drawGrid(); drawGroundReflection(); // Draw horizon line ctx.beginPath(); ctx.moveTo(0, canvas.height * 0.7); ctx.lineTo(canvas.width, canvas.height * 0.7); ctx.strokeStyle = colors.horizon; ctx.lineWidth = 2; ctx.stroke(); // Draw scanline effect on the whole canvas for (let i = 0; i < 10; i++) { const scanlineY = i * 80; if (scanlineY < canvas.height) { const scanlineGradient = ctx.createLinearGradient(0, scanlineY, canvas.width, scanlineY); scanlineGradient.addColorStop(0, 'rgba(0, 255, 255, 0.1)'); scanlineGradient.addColorStop(0.5, 'rgba(0, 255, 255, 0.5)'); scanlineGradient.addColorStop(1, 'rgba(0, 255, 255, 0.1)'); ctx.beginPath(); ctx.moveTo(0, scanlineY); ctx.lineTo(canvas.width, scanlineY); ctx.strokeStyle = scanlineGradient; ctx.lineWidth = 1; ctx.stroke(); } } animationId = requestAnimationFrame(animate); } // Start animation animate(); // Controls document.getElementById('pauseBtn').addEventListener('click', () => { isAnimating = !isAnimating; document.getElementById('pauseBtn').textContent = isAnimating ? 'Pause' : 'Resume'; if (isAnimating) { animate(); } else { cancelAnimationFrame(animationId); } }); document.getElementById('restartBtn').addEventListener('click', () => { // Reset animation state isAnimating = true; time = 0; sunY = -100; // Reset stars stars.forEach(star => { star.y = Math.random() * canvas.height; star.x = Math.random() * canvas.width; }); // Reset grid gridLines.forEach(line => { line.y = (Math.random() * 20) * (canvas.height / 20); }); // Restart animation cancelAnimationFrame(animationId); animate(); }); </script> </body> </html>
I see the issue. There are several places where the variable name "reflectionGradient" is used but should be "reflectionGradientGround". Let me fix all instances of this variable name in the code:
{"path":"index.html","edits":[{"oldText":"const reflectionGradientGround = ctx.createLinearGradient(0, reflectionY, 0, reflectionY + reflectCould not find edits[0] in index.html. The oldText must match exactly including all whitespace and newlines.
I need to be more precise with the text. Let me check the exact text and make the replacement with the correct context. Let me first read the file again to get the exact text around the issue: