OFF
# File created from 2D grid of points.
6 2 0
0.0 2.0 0.0
1.0 1.0 0.0
2.0 1.0 0.0
0.0 1.0 1.0
1.0 0.0 1.0
2.0 0.0 1.0

4 0 1 4 3
4 1 2 5 4