帮我写个贪吃蛇小程序

好的，我可以为您写一个简单的贪吃蛇小程序。

这是 Python 代码：

import turtle
import time

wn = turtle.Screen()
wn.title("贪吃蛇")
wn.bgcolor("black")
wn.setup(width=600, height=600)

# 创建一个蛇头
head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("white")
head.penup()
head.goto(0,0)
head.direction = "stop"

# 创建食物
food = turtle.Turtle()
food.speed(0)
food.shape("circle")
food.color("red")
food.penup()
food.goto(0,100)

# 创建一个蛇身
segments = []

# 定义方向
def go_up():
    if head.direction != "down":
        head.direction = "up"

def go_down():
    if head.direction != "up":
        head.direction = "down"

def go_left():
    if head.direction != "right":
        head.direction = "left"

def go_right():
    if head.direction != "left":
        head.direction = "right"

def move():
    if head.direction == "up":
        y = head.ycor()
        head.sety(y + 20)

    if head.direction == "down":
        y = head.ycor()
        head.sety(y - 20)

    if head.direction == "left":
        x = head.xcor()
        head.setx(x - 20)

    if head.direction == "right":
        x = head.xcor()
        head.setx(x + 20)

# 键盘事件
wn.listen()
wn.onkeypress(go_up, "Up")
wn.onkeypress(go_down, "Down")
wn.onkeypress(go_left, "Left")
wn.onkeypress(go_right, "Right")

# 游戏循环
while True:
    wn.update()

    # 检查是否碰到边界
    if head.xcor()>290 or head.xcor()<-290 or head.ycor()>290 or head.ycor()<-290:
        time.sleep(1)
        head.goto(0,0)
        head.direction = "stop"

        # 清空蛇身
        for segment in segments:
            segment.goto(1000, 1000)
        
        # 清空蛇身列表
        segments.clear()

    # 碰到食物
    if head.distance(food)