[im] stroboscopic patterns for easter eggs

[János Sugár]

<https://www.youtube.com/watch?v=JfajQ4_hSN0>https://www.youtube.com/watch?v=JfajQ4_hSN0
Various patterns are generated in Matlab using mathematical equations 
similar to ones describing Spirograph (or harmonograph) and 
Phyllotaxis. The patterns are calculated in such a way that when 
rotated under a stroboscopic light of suitable frequency or when 
recorded by a camera, they start to animate. It is kind of 
zoetrope--- early device for animation.
Eggs were painted using EggBot (designed by Bruce Shapiro as open 
hardware and available as a kit 
from <http://www.evilmadscientist.com/>http://www.evilmadscientist.com/). 
To draw on eggs, we used standard permanent markers and an electro 
kistka with bee wax followed by dying. Eggs are rotated at a constant 
speed, special for each pattern, by a brushless motor. No computer 
graphics tricks are used in the video.

Author: Jiri Zemanek
(Czech Technical University in Prague, Faculty of Electrical 
Engineering, Department of Control 
Engineering, <http://aa4cc.dce.fel.cvut.cz/>http://aa4cc.dce.fel.cvut.cz/)