responsive_html/index.html at main · gspcoder/responsive_html · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            display: block;
            align-items: center;
            justify-content: center;
            min-height: 120vh;
        }
        .container {
            position: relative;
            height: 200px;
            width: 200px;
            background-color: #000000;
            animation: animate 1s linear infinite;
            transform: rotate(45deg);
        }

    </style>
</head>
<body>
    <div class = "container"></div>
</body>
</html>