size 7x7
0 0 1 1 1 1 0
1 1 1 2 2 1 1
1 6 2 4 3 1 1
1 2 2 2 3 2 1
1 2 1 4 2 2 1
1 2 2 2 2 2 1
1 1 1 1 1 1 1