v -1 -1 -1 v 1 -1 -1 v -1 1 -1 v 1 1 -1 v -1 -1 1 v 1 -1 1 v -1 1 1 v 1 1 1 m 0.8 0.8 0.8 l 1.27 1.27 1.27 f 5 7 8 6 l 0 0 0 m 0.84 0.84 0.84 f 1 2 4 3 f 3 4 8 7 m 0.54 0.54 0.54 f 1 5 6 2 m 1 0 0 f 1 3 7 5 m 0 0 1 f 2 6 8 4