c  This makes recursively nested solid squares 
c  Changing all the .4's will change the relative 
c  scale of boxes.  With .4's each side is about
c  .4 times the side of its enclosing box.  You 
c  can get shaded boxes by changing probabilities. 
points 5000
seed 19818181
trans  .25   0.4	0	0	0.4	0	0
trans  .25   0.4	0	0	0.4	0.4	0
trans  .25   0.4	0	0	0.4	0	0.4
trans  .25   0.4	0	0	0.4	0.4	0.4