8 -1.0 -1.0 1.0 -1.0 1.0 1.0 1.0 1.0 1.0 1.0 -1.0 1.0 -1.0 -1.0 -1.0 -1.0 1.0 -1.0 1.0 1.0 -1.0 1.0 -1.0 -1.0 6 0 3 2 1 2 3 7 6 3 0 4 7 1 2 6 5 4 5 6 7 5 4 0 1