c  This makes recursively nested solid squares 
c  Changing all the .2's will change the relative 
c  scale of boxes.  With .2's each side is about
c  .2 times the side of its enclosing box.  You 
c  can get shaded boxes by changing probabilities. 
points 5000
seed 19818181
trans  .25   0.2	0	0	0.2	0	0
trans  .25   0.2	0	0	0.2	0.2	0
trans  .25   0.2	0	0	0.2	0	0.2
trans  .25   0.2	0	0	0.2	0.2	0.2