text: import pygame
  from pygame.sprite import Sprite
  
  import game_func as gf
  
  
  class LowerWall(Sprite):
      def __init__(self, settings):
          """Initializes the settings for the bottom wall."""
          Sprite.__init__(self)
  
          self.settings = settings
          self.height = 0
          # Load the image and set the frame.
          self.image = pygame.transform.scale(pygame.image.load('./img/models/walls/lower_wall.png'), (100, self.height))
          self.rect = self.image.get_rect()
  
      def update_image(self):
          """Updates the image to the desired height."""
          self.image = pygame.transform.scale(pygame.image.load('./img/models/walls/lower_wall.png'), (100, self.height))
          self.rect = self.image.get_rect()
  
      def update(self):
          """Updates the position of the bottom wall on the screen."""
          self.rect.x -= self.settings.walls_speed