CSS3 Loading Spinner

1<div class="demo">
2  <div class="circle">
3    <div class="inner"></div>
4  </div>
5  <div class="circle">
6    <div class="inner"></div>
7  </div>
8  <div class="circle">
9    <div class="inner"></div>
10  </div>
11  <div class="circle">
12    <div class="inner"></div>
13  </div>
14  <div class="circle">
15    <div class="inner"></div>
16  </div>
17</div>