Synthwave sunset · gemini-3.5-flash-lite
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
**Defining the Scene** I'm currently focused on defining the initial requirements and scope of this web application. The goal is clear: a single-page app (`index.html`) showcasing a synthwave sunset with a glowing gradient sun and horizontal scanlines. I'm visualizing the core elements to guide development. **Refining the Retro Vision** I'm now diving deeper into the specific visual elements. I envision an infinite neon grid that scrolls towards the viewer, enhancing the retro feel. A twinkling starfield in the background will add depth. The horizon will reflect a stunning grid landscape with the sun, mountain silhouettes, and the glowing grid, all self-contained within the `index.html` file, no external dependencies. **Adding Visual Layers** I'm now integrating low-poly wireframe mountains with glowing edges into the scene to enhance visual depth. The plan is a scrolling perspective grid, neon lines fading into the distance, with an optional mirror effect from the ground grid. I'm exploring subtle CRT overlay, and interactivity for play/pause, speed, and color themes is being considered. I'm also planning to build a web audio synth. **Integrating Audio Controls** I'm now integrating the web audio synth, focusing on a minimal UI. It will include a toggle for audio, and I'll include a simple arpeggiator (or pad). I am prioritizing responsiveness, a clean retro UI, and overlay controls that are either hidden or toggleable for an immersive experience. **Verifying Project Requirements** I'm now focusing on verifying the core project requirements. This includes confirming a single-page web app using `index.html`, which will use inline CSS and JavaScript, and no external resources or CDNs. I will ensure all elements are self-contained. The plan is to build interactive features such as audio controls, and theme toggles. I am verifying the scope includes an interactive web audio synth.
index.html (23108 bytes)Successfully wrote 23108 bytes to index.html
thinking
**Verifying File Creation** I'm now confirming the file's successful creation. My focus has shifted towards the specific visual requests: an animated synthwave sunset with a glowing gradient sun and scanlines. I'm also ensuring the infinite neon grid scrolling towards the viewer is present, as well as the starfield and reflected horizon. I'm making sure it remains self-contained within `index.html`.
I have created the animated synthwave sunset web app and saved it as a single self-contained `index.html` file in the current directory. ### Features Included: - **Glowing Gradient Sun**: Features dynamic color gradients, glowing atmospheric bloom, and horizontal retro CRT scanline cuts. - **Infinite Scrolling Neon Grid**: 3D perspective grid with exponential depth spacing and atmospheric horizon fog scrolling seamlessly toward the viewer. - **Starfield**: Twinkling star field in a deep retro purple/blue night sky with mouse parallax. - **Neon-Edge Mountains**: Multi-layered procedural mountain silhouettes with glowing neon outlines. - **Audio Synthesizer**: Built-in Web Audio API synthesizer generating authentic 80s synth pad chords and arpeggios (toggleable). - **Themes & Controls**: Customizer UI to switch color themes (Classic Sunset, Cyberpunk Cyan, Blood Moon, Matrix Acid, Outrun Night), adjust grid speed, sun size, and minimize UI. - **CRT Scanline & Vignette Effects**: Pure CSS scanline pattern and vignette overlays for that authentic 1980s arcade feel.
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 mountain horizon; consistent across inputs with UI controls for theme/speed.
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.