snake1

import pygame, random, time

pygame.init()

width = 400
height = 400
game_screen = pygame.display.set_mode((width, height))

x, y = 200, 200
delta_x, delta_y = 0, 0

food_x, food_y = random.randrange(0, width)//10*10, random.randrange(0, height)//10*10

body_list = [(x, y)]

clock = pygame.time.Clock()

game_over = False

def snake():
  global x, y, food_x, food_y, game_over
  #x = x + delta_x
  #y = y + delta_y
  x = (x + delta_x)%width
  y = (y + delta_y)%height


  if((x, y) in body_list):
    game_over = True
    return

  body_list.append((x, y))

  if(food_x == x and food_y == y):
    while((food_x, food_y) in body_list):
      food_x, food_y = random.randrange(0, width)//10*10, random.randrange(0, height)//10*10
  else:
    del body_list[0]
    if(game_over):
        pygame.quit()
        quit()

  game_screen.fill((0,0,0))
  pygame.draw.rect(game_screen, (255, 0, 0), [food_x, food_y, 10, 10])
  for (i, j) in body_list:
    pygame.draw.rect(game_screen, (255, 255, 255), [i, j, 10, 10])
  pygame.display.update()

while True:
  events = pygame.event.get()
  for event in events:
    if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_ESCAPE:
        pygame.quit()
        quit()

      if event.key == pygame.K_LEFT:
        if delta_x != 10:
            delta_x = -10
        delta_y = 0
      elif event.key == pygame.K_RIGHT:
        if delta_x != -10:
          delta_x = 10
        delta_y = 0
      elif event.key == pygame.K_UP:
        delta_x = 0
        if delta_y != 10:
          delta_y = -10
      elif event.key == pygame.K_DOWN:
        delta_x = 0
        if delta_y != -10:
          delta_y = 10
      else:
        continue
      snake()

  if(not events):
    snake()
  clock.tick(8)