黑客帝國代碼雨
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>NumberRain</title>
<style type="text/css">
canvas{
display: block;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
function $(id){
return document.getElementById(id);
}
var mywindow=window.screen;
var canvas=$("canvas");
canvas.width=mywindow.width;
canvas.height=mywindow.height;
var str="0123456789abcdefghijklmnopqrstuvwxyz~!@#$%^&*()-+{}|:<>?,.";
str=str.split("");
var fontSize=16;
var cols=canvas.width/fontSize;
var drops=[];
for(var i=0;i<cols;i++){
drops[i]=1;
}
var ctx=canvas.getContext("2d");
function draw(){
ctx.fillStyle="rgba(0,0,0,0.05)";
ctx.fillRect(0,0,canvas.width,canvas.height);
ctx.fillStyle="green";
ctx.font=fontSize+"px arial";
for(var i=0;i<cols;i++){
var text=str[ Math.floor( Math.random() * (str.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>
結果如下所示：
黑客帝國代碼雨黑客帝國代碼雨結果如下所示： 
![A.我的微信運動健走步數記錄（自2017.6.11.起)：至今日（2023.4.27.53：21)，今日健走步數：333[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)