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Matrix digital rain · gemini-2.5-flash

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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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
**Building Digital Rain**

I'm currently focusing on establishing the foundational structure for the Matrix digital rain. My plan is to create a single `index.html` file, incorporating a `<canvas>` element to host the dynamic effect. The initial CSS will then be applied to the `body` and `html` elements.

**Crafting Core Elements**

My focus is now on generating the `index.html` content. This will involve establishing the basic HTML5 structure with the crucial `<canvas>` element, and I'll also begin outlining the initial CSS to ensure the canvas takes up the full viewport with a black background.

write index.html (2934 bytes)
toolResult

Successfully wrote 2934 bytes to index.html

assistant
thinking
**Developing Digital Rain**

I've successfully set up the `index.html` file, implementing the Matrix digital rain effect. This includes the core HTML, full-screen CSS, and JavaScript for the animation, character drawing, and fading. I've also adjusted the font size for improved readability.

**Refining Character Rendering**

I've refined the character rendering, focusing on the specific Katakana set for a more authentic Matrix feel. The logic for stream reset and character selection is now in place, ensuring a dynamic and visually consistent display.

The `index.html` file has been created successfully, containing the Matrix digital rain effect with CSS, HTML, and JavaScript embedded.

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-2.5-flash
vendorGoogle
harnesspi-agent
generated2026-07-22

EVALUATION

4/5 working

Classic Matrix digital rain with green katakana glyphs, trailing fade, and bright leading characters; animates continuously but doesn't react to input.

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 motion20.5%
on click20.7%
on drag17.6%
on wheel17.8%
on enter + space18.4%
on arrow keys18.5%
on w/a/s/d19.5%
frame spread8.9 / 255
console errors0
js errors none

METRICS

runtime14.3s
tokens in3.1k
tokens out1.3k
cached0
cost / run$0.0042