import numpy as np

#from skimage.draw import circle


def morris_water_maze(radius, platform_center, platform_radius):
    x = np.ones([2*radius, 2*radius], dtype=np.uint8)
    
    rr, cc = circle(radius, radius, radius - 1)
    x[rr, cc] = 0
    
    platform = np.zeros_like(x)
    rr, cc = circle(*platform_center, platform_radius)
    platform[rr, cc] = 3  # goal
    x += platform
    
    return x
