# vtk DataFile Version 3.0
vtk output
ASCII
DATASET POLYDATA
POINTS 12 float
10 10 0
20 10 0
20 20 0
10 20 0
20 30 0
10 30 0
0 20 0
0 10 0
10 0 0
20 0 0
30 10 0
30 20 0
POLYGONS 10 40
3 8 9 0
3 2 10 11
3 10 2 1
3 2 5 3
3 4 5 2
3 7 0 6
3 3 6 0
3 9 1 0
3 0 1 3
3 1 2 3