v 0.0 0.0 0.0 v 1.0 0.0 0.0 v 1.0 1.0 0.0 v 0.0 1.0 0.0 v 0.0 0.0 1.0 v 1.0 0.0 1.0 v 1.0 1.0 1.0 v 0.0 1.0 1.0 l 1 2 l 3 4 l 5 6 7 8 5