#Mesh 3x4 nodes
32 4

 0 B  1  8
 1 R  2  9  0
 2 R  3 10  1
 3 R  4 11  2
 4 R  5 12  3
 5 R  6 13  4
 6 R  7 14  5
 7 R    15  6
 8 R  9 16     0
 9 R 10 17  8  1
10 R 11 18  9  2
11 R 12 19 10  3
12 R 13 20 11  4
13 R 14 21 12  5
14 R 15 22 13  6
15 R    23 14  7
16 R 17 24     8
17 R 18 25 16  9
18 R 19 26 17 10
19 R 20 27 18 11
20 R 21 28 19 12
21 R 22 29 20 13
22 R 23 30 21 14
23 R    31 22 15
24 R 25       16
25 R 26    24 17
26 R 27    25 18  
27 R 28    26 19
28 R 29    27 20 
29 R 30    28 21
30 R 31    29 22
31 R       30 23 
