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Synthwave sunset · qwen3.5-plus-02-15

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.

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transcript · 4 messages
user

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.

assistant
thinking
The user wants me to create a single-page web app with an animated synthwave sunset scene. This should include:
1. A glowing gradient sun
2. Scanlines effect
3. An infinite neon grid that scrolls toward the viewer
4. A starfield
5. A reflected horizon (water reflection)

All in one self-contained index.html file with no external resources. Let me create this with HTML, CSS, and JavaScript all inline.
write /tmp/ws/index.html (10128 bytes)
toolResult

Successfully wrote 10128 bytes to /tmp/ws/index.html

assistant
thinking
Done! I've created `/tmp/ws/index.html` - a self-contained synthwave sunset animation featuring:

- **Glowing gradient sun** with yellow-to-pink-to-purple colors and horizontal scanlines
- **Starfield** with twinkling stars in the dark purple sky
- **Infinite scrolling neon grid** with perspective lines (magenta vertical, cyan horizontal) moving toward the viewer
- **Reflected horizon** with the sun and grid mirrored in a shimmering water surface below
- **CRT-style scanlines** overlay for that retro aesthetic
- **Vignette effect** for added atmosphere

All CSS and JavaScript are inline - no external dependencies. Open the file in a browser to see the animation!

Done! Created `/tmp/ws/index.html` with a complete synthwave sunset animation featuring: - **Glowing gradient sun** (yellow → pink → purple) with moving scanlines - **Twinkling starfield** in a dark purple sky gradient - **Infinite scrolling neon grid** with magenta vertical lines and cyan horizontal lines scrolling toward the viewer - **Reflected horizon** with the sun and grid mirrored in shimmering water - **CRT scanline overlay** and vignette for retro atmosphere Open `index.html` in a browser to see the animation.

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-plus-02-15
vendorQwen
harnesspi-agent
generated2026-08-01

EVALUATION

4/5 working

Static-looking synthwave sun, scanlines, grid, and starfield; grid lines shift slightly with sun position but no visible scrolling animation.

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.

idle motion0.2%
on click0.3%
on drag8.8%
on wheel6.1%
on enter + space6.4%
on arrow keys5.8%
on w/a/s/d6.2%
frame spread37.7 / 255
console errors0
js errors none

METRICS

runtime44.9s
tokens in6.2k
tokens out3.3k
cached0
cost / run$0.0068