1<body>
2 <div class="animation-container">
3 <div class="sound-container">
4 <div class="rect-1"></div>
5 <div class="rect-2"></div>
6 <div class="rect-3"></div>
7 <div class="rect-4"></div>
8 <div class="rect-5"></div>
9 <div class="rect-6"></div>
10 <div class="rect-5"></div>
11 <div class="rect-4"></div>
12 <div class="rect-3"></div>
13 <div class="rect-2"></div>
14 <div class="rect-1"></div>
15 </div>
16 </div>
17</body>