你如何让一辆车朝它面对的方向移动？(使用python和turtle图形)

import turtle

# 创建一个画布和一个画笔
canvas = turtle.Screen()
pen = turtle.Turtle()

# 设置画笔的形状为一辆车
pen.shape("turtle")

# 定义车的移动函数
def move_forward():
    pen.forward(100)

def turn_left():
    pen.left(90)

def turn_right():
    pen.right(90)

# 绑定键盘事件
canvas.onkey(move_forward, "Up")
canvas.onkey(turn_left, "Left")
canvas.onkey(turn_right, "Right")

# 开始监听键盘事件
canvas.listen()

# 保持窗口不关闭
turtle.done()