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Synthwave sunset · claude-sonnet-5.5

Output generated Cost / run $0.0614 Runtime 32.9s

Prompt for this run

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.

⛨ 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

modelclaude-sonnet-5.5
vendorAnthropic · Claude
harnesspi 0.87.1 · browser iteration
generated2026-10-05

METRICS

runtime32.9s
tokens in28k
tokens out3.1k
cached16k
cost / run$0.0614
Transcript · 13 messages
system

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
→ write /tmp/job-oC2uTP/index.html (2897 bytes)
→ browser {"action":"screenshot"}
toolResult

Successfully wrote to /tmp/job-oC2uTP/index.html

toolResult

Frame 1, +1ms

[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."],"dom":"","images":"attached"}

assistant
thinking
I notice the scanline bars are poking out past the sun's circular edge, so I need to clip them to the circle shape, and the reflection could use a brightness boost since it looks too faint and dark.

The scanline bars stick out past the sun's edge. I'll clip them to the circle.

→ bash {"command":"cd /tmp/job-oC2uTP && python3 - <<'E'\ns=open('index.html').read()\ns=s.replace(\"// scanlines cut from sun (sky color), thicker
→ browser {"action":"screenshot"}
toolResult

/bin/bash: line 1: python3: command not found Command exited with code 127

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."],"dom":"","images":"attached"}

assistant

Python isn't installed, so that edit didn't apply. I'll make it with the edit tool.

→ edit {"path":"/tmp/job-oC2uTP/index.html","edits":[{"oldText":"// scanlines cut from sun (sky color), thicker towards bottom","newText":"x.save()
→ browser {"action":"reload"}
→ browser {"action":"screenshot"}
toolResult

Successfully replaced 2 block(s) in /tmp/job-oC2uTP/index.html.

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."],"dom":"","images":"attached"}

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."],"dom":"","images":"attached"}

assistant

The animated synthwave sunset is in `/tmp/job-oC2uTP/index.html`. It's a single self-contained file with no external resources. I checked it in the browser through screenshots only. I didn't run the motion capture, and the only console message was the sandbox iframe warning. I didn't click or interact with it, since it has no controls. - **Sun:** a glowing yellow-to-pink gradient disc with horizontal scanline bands cut through its lower half. It sinks toward the horizon over a 24-second loop, then jumps back to the top and starts again. - **Grid:** neon magenta lines with a cyan glow. The horizontal lines scroll toward the viewer with perspective spacing, and the vertical lines converge at the horizon. - **Stars:** about 220 twinkling stars in the upper sky. - **Reflection:** a shimmering pink reflection of the sun on the ground below the horizon, plus a glowing horizon line. - **Overlay:** a faint CRT-style scanline texture over the whole scene. My first version let the scanline bars stick out past the sun's edge. I clipped them to the circle, and the second screenshot shows the sun clean.