Oldschool Pi demonstrations.

## Find nice Pi Visualisations and recreate them
If you google Pi you always get those nice GIFs about how Pi is defined and calculated, trying to recreate some of them would be interesting

For example:
### A Rolling wheel full of paint
Actually simulate the wheel rolling instead of just making it rotate by 360 degrees and moving pi * d to the side. Where the wheel touches the ground, paint it red. Have a ruler next to it so you can see what you end up with