Не работает,что делать ? Помогите пж

import pygame from random import randrange RES = 800 SIZE = 50 x, y = randrange(0, RES, SIZE), randrange(SIZE, RES - SIZE, SIZE) apple = randrange(0, RES, SIZE), randrange(SIZE, RES - SIZE, SIZE) length = 1 snake = [(x, y)] dx, dy = 0, 0 fps = 5 pygame.init() sc = pygame.display.set_mode([RES, RES]) clock = pygame.time.Clock() while True: sc.fill(pygame.Color('black')) # drawing snake, apple [(pygame.draw.rect(sc, pygame.Color('red'), (i, j, SIZE, SIZE))) for i, j in snake] pygame.draw.rect(sc, pygame.Color('green'), (*apple, SIZE, SIZE)) # snake movement x += dx * SIZE y += dy * SIZE snake.append((x, y)) snake = snake[-length:] # eating apple if snake[-1] == apple: apple = randrange(SIZE, RES - SIZE, SIZE), randrange(SIZE, RES - SIZE, SIZE) length += 1 fps += 1 score += 1 # game over if x < 0 or x > RES - SIZE or y < 0 or y > RES - SIZE: if lean(snake) != len(set(snake)): clock.tick(fps) for event in pygame.event.get(): if event.type == pygame.QUIT: exit() # control key = pygame.key.get_pressed() if key[pygame.K_w]: dx, dy = 0, -1 if key[pygame.K_s]: dx, dy = 0, -1 if key[pygame.K_a]: dx, dy = -1, 0 if key[pygame.K_d]: dx, dy = 1, 0