# Grid network
#
#  0 --> 1 --> 2
#  |     |     |
#  v     v     v
#  3 --> 4 --> 5
#  |     |     |
#  v     v     v
#  6 --> 7 --> 8

0,1,0,1,0,0,0,0,0
0,0,1,0,1,0,0,0,0
0,0,0,0,0,1,0,0,0
0,0,0,0,1,0,1,0,0
0,0,0,0,0,1,0,1,0
0,0,0,0,0,0,0,0,1
0,0,0,0,0,0,0,1,0
0,0,0,0,0,0,0,0,1
0,0,0,0,0,0,0,0,0

