试一试 - CSS Reference keyframes4

<!DOCTYPE html>
<html>
<head>
<style> 
div {
    width: 100px;
    height: 100px;
    background: red;
    position: relative;
    -webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */ 
    animation: mymove 5s infinite;
}

/* Chrome, Safari, Opera */ 
@-webkit-keyframes mymove {
    0%   {top: 0px; left: 0px; background: red;}
    25%  {top: 0px; left: 100px; background: blue;}
    50%  {top: 100px; left: 100px; background: yellow;}
    75%  {top: 100px; left: 0px; background: green;}
    100% {top: 0px; left: 0px; background: red;}
}

/* Standard syntax */
@keyframes mymove {
    0%   {top: 0px; left: 0px; background: red;}
    25%  {top: 0px; left: 100px; background: blue;}
    50%  {top: 100px; left: 100px; background: yellow;}
    75%  {top: 100px; left: 0px; background: green;}
    100% {top: 0px; left: 0px; background: red;}
}
</style>
</head>
<body>

<p><strong>Note:</strong> The @keyframes rule is not supported in Internet Explorer 9 and earlier versions.</p>

</body>
</html>