Because it's Friday: Spinning Patterns

I remember, as a child, sitting  alongside spinning circles of paper and creating patterns. Sometimes we created with a pen; we tried to be precise, but often ended up with a complete mess. We would also turn the spinner to top speed and splash brightly coloured paint onto the paper and watch it spread out through the centrifugal force being applied to it.

We never managed to create anything quite as mesmerising as this:

http://www.youtube.com/watch?v=dOSGS9ruj4U