These videos were generated using the excellent freeware program JPGVideo. The animation runs at 6 frames a second and since the frames were originally taken at 15 second intervals, the actual video speed is 90 times faster than real time. Rather than reproduce the videos here, the links below access the Booker GC Blogspot where they were originally published. The content should be self evident, but a description is included with each video in the blogspot. Enjoy.