python海龟绘图红绿灯

以下是使用Python海龟绘图库绘制红绿灯的示例代码：

import turtle
import time

# 画出边框
turtle.width(20)
for i in range(2):
    turtle.left(90)
    turtle.fd(300)
    turtle.left(90)
    turtle.fd(150)

turtle.hideturtle()  # 隐藏海龟

# 画红绿灯
turtle.penup()
turtle.goto(-75, 75)  # 移动到红灯位置
turtle.pendown()
turtle.fillcolor("red")
turtle.begin_fill()
turtle.circle(75)  # 画红灯圆
turtle.end_fill()

turtle.penup()
turtle.goto(-75, -75)  # 移动到绿灯位置
turtle.pendown()
turtle.fillcolor("green")
turtle.begin_fill()
turtle.circle(75)  # 画绿灯圆
turtle.end_fill()

turtle.penup()
turtle.goto(-75, 0)  # 移动到黄灯位置
turtle.pendown()
turtle.fillcolor("yellow")
turtle.begin_fill()
turtle.circle(75)  # 画黄灯圆
turtle.end_fill()

# 控制红绿灯状态
while True:
    turtle.fillcolor("gray")  # 灭灯
    turtle.penup()
    turtle.goto(-75, 75)  # 移动到红灯位置
    turtle.pendown()
    turtle.begin_fill()
    turtle.circle(75)  # 画红灯圆
    turtle.end_fill()
    time.sleep(1)

    turtle.fillcolor("red")  # 红灯亮
    turtle.penup()
    turtle.goto(-75, 75)  # 移动到红灯位置
    turtle.pendown()
    turtle.begin_fill()
    turtle.circle(75)  # 画红灯圆
    turtle.end_fill()
    time.sleep(3)

    turtle.fillcolor("gray")  # 灭灯
    turtle.penup()
    turtle.goto(-75, 0)  # 移动到黄灯位置
    turtle.pendown()
    turtle.begin_fill()
    turtle.circle(75)  # 画黄灯圆
    turtle.end_fill()
    time.sleep(1)

    turtle.fillcolor("green")  # 绿灯亮
    turtle.penup()
    turtle.goto(-75, -75)  # 移动到绿灯位置
    turtle.pendown()
    turtle.begin_fill()
    turtle.circle(75)  # 画绿灯圆
    turtle.end_fill()
    time.sleep(3)