recticle.icn: Program to draw rectangles recursively

This program draws filled color rectangles recursively.

The options supported are

     -w i    width of image; default 400
     -h i    height of image; default 250
     -p s    palette; default "c3"
     -g i    gap between rectangles; default 3
     -i      save image file; default no
     -n s    default image file prefix; default "recticle"
     -m i    minimum length of side; default 10
     -b i    bias -- affects size choices; default 20