Synthwave sunset · gemini-3.1-flash-lite

Output generated Cost / run $0.0039 Runtime 7.3s

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

modelgemini-3.1-flash-lite

vendorGoogle

harnesspi-agent

generated2026-07-22

METRICS

runtime7.3s

tokens in4.5k

tokens out1.8k

cached0

cost / run$0.0039

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

**Designing the Synthwave App**

Okay, I'm starting to visualize this single-page web app. The animated synthwave sunset is the core. Right now, I'm focused on the glowing gradient sun and thinking about the details of how to implement the scanlines and infinite neon grid that scrolls towards the viewer. I'm also considering the starfield and reflection.


**Refining the Implementation**

Now I'm delving deeper into the technical specifics. I'm prioritizing the single-file constraint, ensuring no external resources. The canvas element is central for either WebGL or 2D context. I'm tackling the `requestAnimationFrame` loop, and outlining the grid's projection. I'm picturing the sun as a radial gradient circle. For the scanlines, an overlaying div looks promising. The stars will be randomly positioned, and possibly static. The grid uses perspective projection with infinite movement.

→ write index.html (3761 bytes)

toolResult

Successfully wrote 3761 bytes to index.html

assistant

The `index.html` file has been created and includes the animated synthwave scene as requested. You can open this file in any web browser to view the retro-futuristic simulation. Key features implemented: - **Glowing Gradient Sun:** A radial gradient circle positioned at the horizon. - **Infinite Neon Grid:** Uses custom perspective math to animate lines moving toward the viewer. - **Starfield:** A static background layer of procedurally generated stars. - **Scanlines:** A CSS overlay layer providing the classic CRT monitor texture. - **Responsiveness:** The animation automatically adjusts to browser window resizing.