Pure Css Loader - Square

1<div class="loader">
2  <div class="square" ></div>
3  <div class="square"></div>
4  <div class="square last"></div>
5  <div class="square clear"></div>
6  <div class="square"></div>
7  <div class="square last"></div>
8  <div class="square clear"></div>
9  <div class="square "></div>
10  <div class="square last"></div>
11</div>
12