console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>

    <style type="text/css">

        #trans-1 {
            margin: 100px;
            width: 400px;
            height: 200px;
            background-color: green;
            text-align: center;
            animation: rotateit 4s;
        }

        @keyframes rotateit {
            from {}
            to { transform: rotate(3600deg) ;
            

            }
       
        }

    </style>
</head>
<body>

<div id="trans-1"></div>

</body>
</html>