贪玩蓝月

纯CSS写的一个动态效果，开始看着这个不知道怎么写的，实际上上是小盒子里面有一个大盒子，使用定位和动画完成的
<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
    <style type="text/css">
        *{
            margin: 0;
            padding: 0;
            list-style-type: none;
        }
        .wrap{
            position:relative;
            width: 400px;
            height: 400px;
            margin: 0 auto;
            border: 1px solid #ff6700;
            
        }
        .inner{
            position: absolute;
            z-index: 5;
            color: red;
            width: 400px;
            height: 400px;
            line-height: 200px;
            font-size: 150px;
            letter-spacing: 20px;
            text-align: center;
        }
        .box{
            background-color: #f00;
            overflow: hidden;
            z-index: 100;
            position: absolute;
            top: 0;
            left: 0;
            width: 200px;
            height: 200px;
            animation:hezi 2s linear infinite;
        }
        @keyframes hezi{
            0%{left: 0;top: 0;}
            25%{left: 200px;top: 0;}
            50%{left: 200px;top:200px}
            75%{left: 0;top: 200px;}
            100%{left: 0;top: 0;}
        }
        .innerBox{
            position: absolute;
            color: white;
            z-index: 500;
            width: 400px;
            height: 400px;
            line-height: 200px;
            font-size: 150px;
            letter-spacing: 20px;
            text-align: center;
            animation: txt 2s linear infinite;
        }
        @keyframes txt{
            0%{left: 0;top: 0;}
            25%{left: -200px;top: 0;}
            50%{left: -200px;top:-200px}
            75%{left: 0;top: -200px;}
            100%{left: 0;top: 0;}
        }
        </style>
</head>
<body>
    <div class="wrap">
        <div class="inner">
            贪玩蓝月
        </div>
        <div class="box">
            <div class="innerBox">
                贪玩蓝月
            </div>
        </div>
    </div>
</body>
</html>