Flow-field particles · grok-4.20

The task is to create a full-screen flow-field particle animation using p5.js. It must be a single self-contained index.html file with CSS in <style>, JS in <script>, and include the p5.min.js via <sc...

The task is to create a full-screen flow-field particle animation using p5.min.js. It needs thousands of particles advected by Perlin-noise vectors, leaving fading trails, with colors shifting over ti...The task is to create a full-screen flow-field particle animation using p5.min.js. It needs thousands of particles advected by Perlin-noise vectors, leaving fading trails, with colors shifting over time. All in one self-contained index.html file with CSS in <style>, JS in <script>, and include <script src="p5.min.js"></script>.

I need to write the complete index.html file.

First, sketch the code.

Use global mode since p5.min.js global.

HTML:

<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="utf-8">

<title>Flow Field Particles</title>

<style style>

body { margin: 0; overflow: hidden; background: black; }

canvas { display: block; }

</style>

<script src="p5.min.js"></script>

</head>

<body>

<script>

// code here

let particles = [];

let flowField;

let cols, rows;

let res = 20;

let zoff = 0;

function setup() {

  createCanvas(windowWidth, windowHeight);

  colorMode(HSB, 360, 100, 100);

  cols = floor(width / res);

  rows = floor(height / res);

  flowField = new Array(cols * rows);

 for (let i = 0; i < 5000; i++) {

    particles.

The task is complete. The single self-contained index.html file has been created with p5.min.js loaded, full-screen canvas, thousands of particles (6500), Perlin noise flow field updated every frame w...