Synthwave sunset · qwen3.5-35b-a3b

Output generated Cost / run $0.0037 Runtime 36.6s

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.

⛨ sandboxed Open in new tab ↗

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

modelqwen3.5-35b-a3b

vendorQwen

harnesspi 0.87.1 · browser iteration

generated2026-10-16

METRICS

runtime36.6s

tokens in10k

tokens out4.0k

cached0

cost / run$0.0037

Transcript · 7 messages

system

user

assistant

thinking

The user wants me to build an animated synthwave landscape with the following requirements:

1. Full-screen canvas with glowing gradient sun broken by horizontal scanline bands
2. Starfield background
3. Perspective neon grid extending from foreground to horizon
4. Animate the grid toward the viewer to suggest forward travel
5. Move sun slowly down toward horizon while keeping composition visible
6. Below the horizon, include a stylized reflection of the sun's colors on the ground plane
7. A 10-20 second loop that repeats without distracting reset jump
8. Pause/Resume and Restart controls
9. Procedural drawing and colors only
10. No external assets, CDNs, or network requests

Let me create a complete self-contained HTML file with all this functionality.

I'll write the code to index.html with:
- CSS for styling the canvas and controls
- JavaScript for the animation, including:
  - Starfield generation
  - Grid with perspective animation
  - Glowing gradient sun with scanlines
  - Sun movement animation
  - Reflection below horizon
  - Pause/Resume and Restart controls
  - Looping logic to avoid jump discontinuities

Let me write this file:

I'll create a complete synthwave landscape animation with all the required features. Let me write the `index.html` file:

→ write /tmp/job-yVFV7l/index.html (14044 bytes)

toolResult

Successfully wrote to /tmp/job-yVFV7l/index.html

assistant

thinking

Now let me open the file in the browser to verify it works correctly.

Now let me open the file in the browser to verify the animation works:

→ browser {"action":"screenshot"}

toolResult

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: sunRadius is not defined"],"dom":"PAUSE\nRESTART\nLoop: 15.0s | Status: Running","images":"attached"}

assistant

thinking

The error says "sunRadius is not defined" - I need to check my code and fix this bug. Let me read the file to see what went wrong.

I see an error about `sunRadius`. Let me fix the code: <read> <file> /tmp/job-yVFV7l/index.html </file> </read>