clears the cells immediately around the grid of the agent
        (just to make it find to see on the screen)

def clear_surroundings(self):
        """
        clears the cells immediately around the grid of the agent
        (just to make it find to see on the screen)
        """
        cells_to_clear = self.grd.eight_neighbors(self.current_y, self.current_x)
        for cell in cells_to_clear:
            self.grd.set_tile(cell[0], cell[1], ' ')