Matrix digital rain · gemini-3.1-flash-lite-preview

Output generated Cost / run $0.0026 Runtime 7.4s

Prompt for this run

Create the Matrix digital rain effect on a full-screen black canvas: columns of falling green katakana glyphs with a trailing fade and a brighter leading character.

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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-preview

vendorGoogle

harnesspi-agent

generated2026-07-22

METRICS

runtime7.4s

tokens in3.8k

tokens out1.1k

cached0

cost / run$0.0026

Transcript · 4 messages

user

Create the Matrix digital rain effect on a full-screen black canvas: columns of falling green katakana glyphs with a trailing fade and a brighter leading character.

assistant

thinking

**Developing Digital Rain**

I'm focusing on the "Matrix digital rain" effect, aiming for an `index.html` file that is self-contained. The goal is no external resources, black background, green katakana glyphs in vertical columns, with trailing fade and a bright lead character. The `<canvas>` element seems key for this.


**Refining Column Logic**

I've been refining the column handling. I'm calculating the number of columns based on font size and screen width. Animation will use `requestAnimationFrame`. For the fade effect, I will be using a semi-transparent black rectangle, or adjusting opacity, to draw the trail. I'm focusing on the Unicode range for Katakana characters. I'm also planning to reset the character y-position to the top randomly.

→ write index.html (2389 bytes)

toolResult

Successfully wrote 2389 bytes to index.html

assistant

The Matrix digital rain effect has been implemented in a single `index.html` file. It features a responsive full-screen canvas, trailing fade, and brighter leading characters using the Katakana Unicode range. You can open `index.html` in any web browser to view the effect.