Circulos

Someone asked me how to do the Spinning Dots by Dave Whyte (https://dribbble.com/shots/1660784-Spinning-dots), so I tried to do it using expressions on After Effects.

Here is the file if someone want to check it out :
https://dl.dropboxusercontent.com/u/656858/Circulos.aep

And here is a tutorial on how I made it (in spanish):
https://www.youtube.com/watch?v=mkJLPvHAHvk&list=UUaQd_KK7dqoXWem92TC3L7Q