Live Demo: Example of CSS3 @keyframes rule

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Example of CSS3 @keyframes rule</title>
<style>
    .box {
        margin: 50px;
        width:153px;
        height:103px;
        background: url("/examples/images/tortoise-transparent.png") no-repeat;
        position: relative;
        /* Chrome, Safari, Opera */
        -webkit-animation-name: moveit;
        -webkit-animation-duration: 2s;
        /* Standard syntax */
        animation-name: moveit;
        animation-duration: 2s;
    }
     
    /* Chrome, Safari, Opera */
    @-webkit-keyframes moveit {
        from {left: 0;}
        to {left: 50%;}
    }
     
    /* Standard syntax */
    @keyframes moveit {
        from {left: 0;}
        to {left: 50%;}
    }
</style>
</head>
<body>
    <p><strong>Note:</strong> Click the "Show Output" button to repeat the animation.</p>
    <div class="box"></div>
</body>
</html>                                     