def build_wall_clusters(map_grid, p_mod):
    for y in range(0, (len(map_grid) - 1)):
        for x in range(0, (len(map_grid) - 1)):
            if ((r.randint(0, 100) / 100) < p_mod):
                build_cluster(map_grid, y, x)
def build_wall_clusters(map_grid, p_mod):
    for y in range(0, (len(map_grid) - 1)):
        for x in range(0, (len(map_grid) - 1)):
            if ((r.randint(0, 100) / 100) < p_mod):
                build_cluster(map_grid, y, x)