Only supported in Safari 5 (iPhone and iPad), Chrome 11 and Firefox 5 (Aurora).
Each vertical line will intersect the centre of the box after a full rotation of 360 degrees. Since each rotating box has a width of 100px, each vertical line appears at 157px intervals (based on π) and 4 complete rotations will happen.
Example 1: Duration 24 seconds
Example 2: Duration 12 seconds
Other similar 2D animations