OFF
8 12 0
 1  1  1
-1  1  1
-1 -1  1
 1 -1  1
 1  1 -1
-1  1 -1
-1 -1 -1
 1 -1 -1
3 0 1 2
3 0 2 3
3 4 0 3
3 4 3 7
3 1 0 4
3 1 4 5
3 2 1 5
3 2 5 6
3 7 3 2
3 7 2 6
3 5 4 7
3 5 7 6