请以编程为我用Python写一个简单的贪吃蛇游戏，注意区分章节，每个章节使用#开头行说明，章节数必须是偶数，每段代码之间使用@@断开。
user
```python
# 导入必要的库
import pygame
import time
import random

# 初始化pygame
pygame.init()
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# 定义颜色
white = (255, 255, 255)
yellow = (255, 255, 102)
black = (0, 0, 0)
red = (213, 50, 80)
green = (0, 255, 0)
blue = (50, 153, 213)

# 定义窗口尺寸
width = 600
height = 400
dis = pygame.display.set_mode((width, height))
pygame.display.set_caption('贪吃蛇游戏')
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# 定义游戏时钟
clock = pygame.time.Clock()
snake_block = 10
snake_speed = 15
@@
# 定义字体样式
font_style = pygame.font.SysFont(None, 50)
score_font = pygame.font.SysFont(None, 35)

# 定义显示分数的函数
def Your_score(score):
    value = score_font.render("你的分数: " + str(score), True, yellow)
    dis.blit(value, [0, 0])
@@
# 定义画蛇的函数
def our_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(dis, black, [x[0], x[1], snake_block, snake_block])
@@
# 定义消息显示函数
def message(msg, color):
    mesg = font_style.render(msg, True, color)
    dis.blit(mesg, [width / 6, height / 3])
@@
# 定义游戏主循环
def gameLoop():
    game_over = False
    game_close = False

    x1 = width / 2
    y1 = height / 2

    x1_change = 0
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0

    while not game_over:

        while game_close == True:
            dis.fill(blue)
            message("你输了! 按Q退出或C重玩", red)
            Your_score(Length_of_snake - 1)
            pygame.display.update()

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

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x1_change = -snake_block
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block
                    x1_change = 0

        if x1 >= width or x1 < 0 or y1 >= height or y1 < 0:
            game_close = True
        x1 += x1_change
        y1 += y1_change
        dis.fill(blue)
        pygame.draw.rect(dis, green, [foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append
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