<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Lissajous Curve Animation</title>
<style>
body {
margin: 0;
background-color: black;
}
canvas {
display: block;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
let width = canvas.width = window.innerWidth;
let height = canvas.height = window.innerHeight;
function drawLissajous(time) {
ctx.clearRect(0, 0, width, height);
ctx.beginPath();
ctx.strokeStyle = 'rgba(0, 153, 255, 0.8)';
ctx.shadowColor = '#00f0ff';
ctx.shadowBlur = 25;
ctx.lineWidth = 2;
const a = 5; // x frequency
const b = 4; // y frequency
const delta = Math.PI / 2;
const scale = 150;
const centerX = width / 2;
const centerY = height / 2;
for (let t = 0; t <= 2 * Math.PI; t += 0.01) {
const x = centerX + scale * Math.sin(a * t + time / 1000);
const y = centerY + scale * Math.sin(b * t);
if (t === 0) {
ctx.moveTo(x, y);
} else {
ctx.lineTo(x, y);
}
}
ctx.stroke();
requestAnimationFrame(drawLissajous);
}
drawLissajous(0);
</script>
</body>
</html>