"Truchet tiles are cute."

Simply tile this image in either of two orientations:

Here's an interactive demonstration: http://miriam-english.org/articles/truch</wbr>et.html (enable javascript)

A monk called Sébastien Truchet invented this in 1704. He also created an early version of Times New Roman.

More info on Truchet tiles here: http://mathworld.wolfram.com/TruchetTili</wbr>ng.html

This post was originally on LiveJournal.