points
12
2.0 0.5 0
1.5 0.0 0
0.5 0.0 0
0.0 0.5 0
0.0 1.0 0
0.5 1.5 0
1.5 1.5 0
2.0 2.0 0
2.0 2.5 0
1.5 3.0 0
0.5 3.0 0
0.0 2.5 0
end points
lines
11
0 1
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11
end lines