Attractors are particles that act as, you guessed it, attractors. Then you send a particle around it, and it can crease some cool paterns. Alot of attractors do nothing... But many do something. The first one I will post:
Xymane Omaroerneg (1390078477) and Ntoetaron Atseun (608554336)
Xymane Omaroerneg (1390078477) is a Trigonometric attractor.
Ntoetaron Atseun (608554336) is a Quadratic attractor.
You can make attractors at:
Strange Attractors