def movement(environment, x ,y):
    movement = {
        "right": (x + 1, y) if x + 1 < GRID_WIDTH and type(environment[x + 1][y]) == Road else (x, y),
        "left": (x - 1, y) if x - 1 >= 0 and type(environment[x - 1][y]) == Road else (x, y),
        "down": (x, y + 1) if y + 1 < GRID_HEIGHT and type(environment[x][y + 1]) == Road else (x, y),
        "up": (x, y - 1) if y - 1 >= 0 and type(environment[x][y - 1]) == Road else (x, y)
    }

    forbidden_movement = {
        "right": "left",
        "left": "right",
        "up": "down",
        "down": "up"
    }

    return (movement, forbidden_movement)