boundary_types = p,-g
boundary_values = 2,-1
initial_gradients =      -0.6,   -1,    8, -0.7,  1.5, -0.4, -1.7,   0
reflection_path = (2,0),(2,1),(3,1),(3,2),(4,0),(3,0),(2,2),(3,2),(4,3)
grid_size = 5
max_radius = 40%