Loading Middle Spin

1<div class="loading spin-1">
2  <div class="loading spin-2">
3    <div class="loading spin-3">
4      <div class="loading spin-4">
5        <div class="loading spin-5">
6          <div class="loading spin-6"></div>
7        </div>
8      </div>
9    </div>
10  </div>
11</div>