research about recursion

I  searched a lot of sketches about recursion .

Followings are the top five  recursions I like most.

I made 5 poster for introducing them .

All elements I used are from screenshots of  the sketches.

TOP 5 : recursive atom

http://www.openprocessing.org/visuals/?visualID=32425

Top 4: recursive tree

http://www.openprocessing.org/visuals/?visualID=5434

Top:3 recursive squares

http://www.openprocessing.org/visuals/?visualID=6643

Top 2 : circle recursion

http://www.openprocessing.org/visuals/?visualID=11008

Top1:concentric circles

http://www.openprocessing.org/visuals/?visualID=20917