boundary_types = p,p
boundary_values = 6,7
initial_gradients =           1, -1.1,  0.8,    1,  1.1,  0.3,  0.5,  1.1,    1
reflection_path =   (2,1),(2,0),(3,0),(3,1),(2,1),(2,2),(1,2),(2,3),(1,3),(1,4),(0,4)
grid_size = 5
max_radius = 70%