1<head>
2 <title>3D Pyramid</title>
3</head>
4
5<body>
6 <div class="pyramid">
7 <div class="glow"></div>
8 <div>
9 <span style="--i: 0"></span>
10 <span style="--i: 1"></span>
11 <span style="--i: 2"></span>
12 <span style="--i: 3"></span>
13 </div>
14 </div>
15</body>