<!DOCTYPE html>
<html>
<head>
<title>number falls</title>
</head>
<body>
<canvas id="canvas"></canvas>
<style type="text/css">
body {
margin: 0;
padding: 0;
overflow: hidden;
}
</style>
<script type="text/javascript">
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var texts = '0123456789'.split('');
var fontSize = 12;
canvas.height = window.screen.height;
canvas.width = window.screen.width;
var columns = canvas.width/fontSize;
var drops = [];
for (var x = 0; x < columns; x++) {
drops[x] = 1;
}
function draw() {
ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = '#0F0';
ctx.font = fontSize + 'px arial';
for (var i = 0; i < drops.length; i++) {
var text = texts[Math.floor(Math.random() * texts.length)];
ctx.fillText(text, i * fontSize, drops[i] * fontSize);
if (drops[i] * fontSize > canvas.height || Math.random() > 0.95) {
drops[i] = 0;
}
drops[i]++;
}
}
setInterval(draw, 33);
</script>
</body>
<html>