<_description>
Subdivides and colors rectangles randomly, for a Mondrian-esque effect.
-http://en.wikipedia.org/wiki/Piet_Mondrian#Paris_1919.E2.80.931938
+https://en.wikipedia.org/wiki/Piet_Mondrian#Paris_1919.E2.80.931938
Written by Jamie Zawinski and Michael Bayne; 1997.
</_description>