This is a little program I wrote that is 100% pen. it writes your recursive drawing. It can create interesting patterns. Comment your favorites below. Use the arrow keys to move and press space to input values for the variables. My favorites: 5,200,120,4 - four sided triangle 4,200,120,3 - Serpenski triangle (looks like it?) 5,200,90,4 - Square cross 5,200,52,4 - Sea Shell