canvas下雪背景特效（共7个文件）
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Snowfall</title>
<link rel="stylesheet" href="css/style.css">
<link rel="stylesheet" href="css/xezbab.css">
</head>
<body>
<canvas id="canvas"></canvas>
<script type="text/javascript" src="js/simplex-noise.min.js"></script>
<script type="text/javascript" src="js/XeZBab.js"></script>
<script type="text/javascript" src="js/script.js?v=a"></script>
<script>
window.canvasOptions = {
autoClear: true,
autoCompensate: false,
autoPushPop: true,
canvas: true,
desynchronized: false,
width: null,
height: null
};
</script>
</body>
</html>