(4 0, 2 -2) x (2 -2, 4 0)

(4 0, 0 0)	(8 0, 0 0)

(2 4, 4 2)

(4 4, 4 4)

(4 8, 4 8)

(6 6, 6 6)

(4 12, 4 12)