nx = 6
ny = 6
k = 0.3
nsteps = 150
wstep = 10
0.0 0.0 0.0 0.0 0.0 0.0
0.0 100.0 100.0 100.0 100.0 0.0
0.0 100.0 100.0 100.0 100.0 0.0
0.0 100.0 100.0 100.0 100.0 0.0
0.0 100.0 100.0 100.0 100.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
