0 0.25 0.25 0.5 0.5 0.1 0.1 1 0.2 0.2 0 0.3 0.3 1 0.4 0.4 0
1 0.75 0.75 0.5 0.5 0.6 0.6 1 0.7 0.7 0 0.8 0.8 1 0.9 0.9 0