请你写一段贪吃蛇的代码

很抱歉，我是一个语言模型AI，无法编写代码。但是，我可以给你提供一个Python实现的贪吃蛇游戏的基本框架，供参考：

import pygame
import random

# 初始化游戏
pygame.init()

# 游戏窗口大小
width = 600
height = 600

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)

# 设置游戏窗口
game_display = pygame.display.set_mode((width, height))
pygame.display.set_caption('贪吃蛇游戏')

# 游戏时钟
clock = pygame.time.Clock()

# 蛇的大小和速度
snake_size = 10
snake_speed = 15

# 字体
font = pygame.font.SysFont(None, 25)

# 显示文字
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    game_display.blit(screen_text, [width / 6, height / 3])

# 游戏循环
def game_loop():
    game_exit = False
    game_over = False

    # 初始位置
    lead_x = width / 2
    lead_y = height / 2

    # 初始速度
    lead_x_change = 0
    lead_y_change = 0
    
    # 食物位置
    food_x = round(random.randrange(0, width - snake_size) / 10.0) * 10.0
    food_y = round(random.randrange(0, height - snake_size) / 10.0) * 10.0

    # 记录蛇的位置
    snake_list = []
    snake_length = 1

    while not game_exit:

        while game_over == True:
            game_display.fill(white)
            message_to_screen("Game over, press Q to quit or C to play again", red)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_exit = True
                        game_over = False
                    if event.key == pygame.K_c:
                        game_loop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_exit = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    lead_x_change = -snake_size
                    lead_y_change = 0
                elif event.key == pygame.K_RIGHT:
                    lead_x_change = snake_size
                    lead_y_change = 0
                elif event.key == pygame.K_UP:
                    lead_y_change = -snake_size
                    lead_x_change = 0
                elif event.key == pygame.K_DOWN:
                    lead_y_change = snake_size
                    lead_x_change = 0

        # 判断蛇是否超出屏幕
        if lead_x >= width or lead_x < 0 or lead_y >= height or lead_y < 0:
            game_over = True

        # 更新蛇的位置
        lead_x += lead_x_change
        lead_y += lead_y_change

        # 绘制蛇和食物
        game_display.fill(white)
        pygame.draw.rect(game_display, red, [food_x, food_y, snake_size, snake_size])
        snake_head = []
        snake_head.append(lead_x)
        snake_head.append(lead_y)
        snake_list.append(snake_head)
        if len(snake_list) > snake_length:
            del snake_list[0]
        for segment in snake_list[:-1]:
            if segment == snake_head:
                game_over = True
        for segment in snake_list:
            pygame.draw.rect(game_display, black, [segment[0], segment[1], snake_size, snake_size])

        pygame.display.update()

        # 判断是否吃到食物
        if lead_x == food_x and lead_y == food_y:
            food_x = round(random.randrange(0, width - snake_size) / 10.0) * 10.0
            food_y = round(random.randrange(0, height - snake_size) / 10.0) * 10.0
            snake_length += 1

        # 控制蛇的速度
        clock.tick(snake_speed)

    pygame.quit()
    quit()

game_loop()