Recursive Exercises XI: Homage to Escher
This Demonstration shows two examples inspired by Escher's Square Limit print. Both rotate the main motif to extend it to fill a square. The first example converges to a square of a size defined at level 0, whereas the second progressively grows toward it.
D. Schattschneider, "The Mathematical Side of M. C. Escher," Notices of the American Mathematical Society, 57(6), 2010 pp. 706–718.