Synthwave sunset · step-3.7-flash
Create an animated synthwave sunset: a glowing gradient sun with scanlines setting over an infinite neon grid that scrolls toward the viewer, with a starfield and a reflected horizon.
transcript · 4 messages
Create an animated synthwave sunset: a glowing gradient sun with scanlines setting over an infinite neon grid that scrolls toward the viewer, with a starfield and a reflected horizon.
thinking
The user wants a single-page web app with an animated synthwave sunset effect. It needs to be fully self-contained in one index.html file with inline CSS and JS, no external resources. Let me design this: 1. A glowing gradient sun with horizontal scanlines 2. An infinite neon grid that scrolls toward the viewer (perspective grid) 3. A starfield with twinkling stars 4. A reflected horizon (sun reflection on the grid) I'll use Canvas API for the main rendering since it's efficient for this kind of animation. Key visual elements: - Background: dark sky gradient (deep purple/blue/black) - Sun: large glowing circle with gradient colors (pink/orange/purple) with horizontal scanlines cutting through it - Grid: perspective grid on the "ground" area with neon lines (cyan/magenta) scrolling toward viewer - Stars: randomly placed dots that twinkle - Reflection: mirror the sun on the grid with opacity I'll create a full-screen canvas animation with requestAnimationFrame. Let me write the complete index.html file.
/workspace/index.html (8798 bytes)Successfully wrote 8798 bytes to /workspace/index.html
thinking
The file has been written successfully. Let me provide a concise summary to the user about what was created.
Created `index.html`. The scene features: - **Sky / Ground** — vertical gradient from deep indigo to neon magenta above a dark horizon - **Sun** — radial + linear gradient disc with animated horizontal scanlines (using `source-atop`) - **Neon Grid** — perspective-mapped vertical and curved horizontal lines scrolling depth-first with edge-to-edge gradient strokes - **Horizon glow** — bright magenta line with soft bloom - **Starfield** — 220 stars with independent twinkle phases - **Reflection** — a flipped, scaled, faded duplicate of the sun + scanlines drawn into the ground plane - **Vignette** — radial darkening to frame the view Everything runs off a single `<canvas>` with `requestAnimationFrame`, no external resources, and responds to window resizing.
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
EVALUATION
Synthwave sunset with glowing gradient sun, scanlines, neon grid, starfield, and horizon reflection; static, no visible grid scroll or input response.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.