This animation shows how a hexagon is gradually changed into a 3 leg spiral propeller. This shape is a triskelion, which has 3-way rotation symmetry but no mirror or other rotation symmetry. This spiral design can tile the plane with no gaps. The animation is done by David Chow during Thanksgiving of 2003.

The first 11 images are shown at 1 second interval. The last image is shown for 5 seconds.

This design is known in Celtic art for a long time.


David Chow's other animation

Many more animated GIF images are included in the CD