Coming soon: Chutes and Ladders: the Integrals & Slopes edition
I suppose I should provide a link for anyone not aware of what Penrose tiling is.
Basically, the (unaltered) pattern is composed entirely of two specific figures -- kites and darts -- and named after mathematician Sir Roger Penrose. They're known for their beauty and the fact that they are not symmetrical even though they look like they should be.