JavaScript 实现跑马灯效果

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		
		<style type="text/css">
			
			*{
				margin: 0;
				padding: 0;
				list-style: none;
			}
			body{
				background: black;
			}
			#div1{
				width: 500px;
				height: 500px;
				margin: 100px auto;
				
				
				border: 1px solid  transparent;
			}
			#div2{
				width: 400px;
				height: 400px;
				border: 1px solid  transparent;
				background-color: green;
				margin: 50px;
				
			}
			#div3{
				width: 300px;
				height: 300px;
				margin: 50px;
				background-color: gold;
				border: 1px solid  transparent;
			}
			
			#div4{
				width: 200px;
				height: 200px;
				margin:  50px;
				background-color: black;
				border: 1px solid  transparent;
			}
			#div5{
				width: 100px;
				height: 100px;
				margin:  50px;
				background-color: palevioletred;
			}
			
		</style>
	</head>
	
	<body>
		
		
		<div id="div1" style="background-color: red;">
			
			<div id="div2">
				
				<div id="div3">
					<div id="div4">
						<div id="div5"></div>
					</div>
				</div>
			</div>
			
		</div>
		
	</body>
	
	<script>
		
		window.onload=function(){
		
			
			window.setInterval(function(){
				
				document.getElementById("div1").style.backgroundColor="rgb("+Math.random()*255+","+ Math.random()*255+","+ Math.random()*255+")";
				
				document.getElementById("div2").style.backgroundColor="rgb("+Math.random()*255+","+ Math.random()*255+","+ Math.random()*255+")";
				document.getElementById("div3").style.backgroundColor="rgb("+Math.random()*255+","+ Math.random()*255+","+ Math.random()*255+")";
				document.getElementById("div4").style.backgroundColor="rgb("+Math.random()*255+","+ Math.random()*255+","+ Math.random()*255+")";
				document.getElementById("div5").style.backgroundColor="rgb("+Math.random()*255+","+ Math.random()*255+","+ Math.random()*255+")";
				
				
			},1);
			
			
		}
		
		
		
		
	</script>
	
</html>
JavaScript 实现跑马灯效果

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