OFF
20 8 0
1 0 0
0.75 0 0
0.5 0 0
0.25 0 0
0 0 0
0 1 0
0.25 1 0
0.5 1 0
0.75 1 0
1 1 0
1 1 0
0.75 1 0
0.5 1 0
0.25 1 0
0 1 0
0 2 0
0.25 2 0
0.5 2 0
0.75 2 0
1 2 0
4  5 6 3 4
4  3 6 7 2
4  1 2 7 8
4  1 8 9 0
4  15 16 13 14
4  13 16 17 12
4  11 12 17 18
4  11 18 19 10