Xavier Golden (relation) found the work of John Rigby (no relation) and, in particular, got interested in his Yemeni Squares work. After an archeological find in Yemen, a monotiling with repeated 90 degree rotations of polyominoes. So, a fun mathart project together.[br][br]Move the black points to change the size of the squares and the red points to change the tile.[br][br]Thanks, Xavi![br][br]Image from: Leonardo , 2009, Vol. 42, No. 2 (2009), pp. 156-162[br]https://www.jstor.org/stable/20532623