This is a simulation of branching random walk on
a 500 x 500 torus.The branching rate is 1. The random walk is nearest
neigbours rate 1.
The simulations pay respect to the genealogy of
the particles and there are 255 different colors attached
to the different families.
The simulation given here starts with 40,000 particles
and the pictures are in time intervals of 125 time
units.