1 0   0.5 0   0.25 
0   1 0   0.5 0.25 
0.25 0   1 0   0.5 
0   0.5 0   1 0.5
1   0.8   0.6   0.4   0.2
1   0.8   0.7   0.6   0.4
0   0.8   0.7   0.6   0.4