Get the square boundary coordinates for a given centre and distance

def get_coord_box(centre_x, centre_y, distance):
    """Get the square boundary coordinates for a given centre and distance"""
    """Todo: return coordinates inside a circle, rather than a square"""
    return {
        'top_left': (centre_x - distance, centre_y + distance),
        'top_right': (centre_x + distance, centre_y + distance),
        'bottom_left': (centre_x - distance, centre_y - distance),
        'bottom_right': (centre_x + distance, centre_y - distance),
    }