16 16
0 0
2 0
2 3
0 3
0.5 0
1.5 0
1.5 1
0.5 1
0.75 0
1.25 0
1.25 0.7
0.75 0.7
0.9 0
1.1 0
1.1 0.4
0.9 0.4
0 1
1 2
2 3
3 0
4 5
5 6
6 7
7 4
8 9
9 10
10 11
11 8
12 13
13 14
14 15
15 12