Freehand Drawing the Penrose Tile in Pen is Surely a Shortcut to Madness

Try #4

Try #3

Try #2

Try #1

I reused this last try to draw my friend sleeping. She rolled over and started snoring, so I then drew her cat.

The problem with trying to draw the Penrose Tile like this, is there's no easy pattern to follow. That sounds strange, since it *is* a pattern, At least intuitively, I can't guess which of the two (and there only are, two) shapes I need to put where, and why. I had to look at a picture - and even mark off which shapes I've already drawn, before drawing something else. It helped to draw shapes that made up circle-ish clumps of shapes, before battling a new part. 

Screws up your mind.