size 6x8
1 1 1 1 1 1 0 0
1 2 2 2 2 1 1 1
1 2 2 2 4 4 2 1
1 2 3 3 3 6 2 1
1 2 2 1 2 4 2 1
1 1 1 1 1 1 1 1