Ringworld animation

This is a small animation I did as a contribution for my final exam. It's Larry Nivens Ringworld (1970), as seen from the systems edge. The small squares close to the sun serve to block out the sun light, to simulate a 'normal' day-night-cycle.
I did this ring in Cinema 4D, took some shots and put everything together in Flash. I would have done the animation in Cinema 4D, but unfortunately there wasn't enough time left.
The background may look a bit cheap, but maybe I'll redo it some other day.
Until then, enjoy.