live - 60fps 1920 x 1080
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Animated Background - Dynamic Pixel Flow</title>
<style>
body {
margin: 0;
overflow: hidden; /* Hide scrollbars */
background-color: #0d1117; /* Dark background */
position: relative;
}
canvas {
display: block; /* Remove extra space below canvas */
}
</style>
</head>
<body>
<canvas id="matrixCanvas"></canvas>
<script>
const canvas = document.getElementById('matrixCanvas');
const ctx = canvas.getContext('2d');
let width = canvas.width = window.innerWidth;
let height = canvas.height = window.innerHeight;
// Characters to use (can be numbers, symbols, or even blank for a more abstract flow)
const characters = '01'; // Binary for a tech feel, or ' ' for purely abstract
const characterSize = 18; // Size of each "pixel"/character
const columns = Math.floor(width / characterSize); // Number of columns
let drops = []; // Array to store the y-position of each falling column's head
// Initialize drops
for (let i = 0; i < columns; i++) {
drops[i] = Math.random() * height; // Start at a random y-position
}
function resizeCanvas() {
width = canvas.width = window.innerWidth;
height = canvas.height = window.innerHeight;
// Recalculate columns and re-initialize drops on resize
const newColumns = Math.floor(width / characterSize);
const newDrops = new Array(newColumns);
for (let i = 0; i < newColumns; i++) {
// Try to preserve current drop position if possible, otherwise randomize
newDrops[i] = drops[i] !== undefined ? drops[i] : Math.random() * height;
}
drops = newDrops;
}
function draw() {
// Semi-transparent background for the "trail" effect
ctx.fillStyle = 'rgba(13, 17, 23, 0.05)'; // Matches body background, but with transparency
ctx.fillRect(0, 0, width, height);
ctx.fillStyle = '#00ff41'; // Green color for the "code"
ctx.font = `${characterSize}px monospace`; // Monospace font for uniform characters
for (let i = 0; i < drops.length; i++) {
const text = characters.charAt(Math.floor(Math.random() * characters.length));
// Draw a small "pixel" or character
ctx.fillText(text, i * characterSize, drops[i]);
// Send the drop back to the top randomly
if (drops[i] * characterSize > height && Math.random() > 0.975) { // 2.5% chance to reset
drops[i] = 0;
}
// Increment y-position of the drop
drops[i] += characterSize;
}
}
// Set an interval for the animation (controls speed)
let animationInterval = setInterval(draw, 50); // 50ms = 20 frames per second
// Event Listeners
window.addEventListener('resize', () => {
resizeCanvas();
// Clear and restart animation interval on resize to apply new 'drops' array
clearInterval(animationInterval);
animationInterval = setInterval(draw, 50);
});
// Initial setup
resizeCanvas(); // Set initial size
draw(); // Draw once immediately
</script>
</body>
</html>About this animation
Flowing grid of dynamic pixels.
Under the hood
Noise-Driven Canvas Pixeling
This effect relies on procedural generation (often Simplex or Perlin noise logic) to dictate the flow field of a pixel grid. It recalculates the intensity of small block coordinates on a canvas, painting them sequentially via
fillRect to create a fluid, retro-digital aesthetic. 
