c  This makes recursively nested solid squares 
c  Changing all the .1's will change the relative 
c  scale of boxes.  With .1's each side is about
c  .1 times the side of its enclosing box.  You 
c  can get shaded boxes by changing probabilities. 
points 5000
seed 19818181
trans  .25   0.1	0	0	0.1	0	0
trans  .25   0.1	0	0	0.1	0.1	0
trans  .25   0.1	0	0	0.1	0	0.1
trans  .25   0.1	0	0	0.1	0.1	0.1