<head> <h4>donghua</h4> </head>
<body> <style> div { height: 50px; width: 80%; background: black; margin: 60px auto; border-radius: 5px; position: relative; } #torino { animation-name: rainbow; animation-duration: 4s; } @keyframes rainbow { 0% { background-color: blue; top: 0px; left: 0px; } 50% { background-color: greenyellow; top: 50px; left: 25px; } 100% { background-color: yellow; top: 0px; left: -25px; } } </style>
<div id="torino"></div> </body>
</html>