注意：作者使用的解释器版本为2.7版本，使用3.8版本会出错
代码：

import turtle

turtle.width(10)

turtle.color("blue")
turtle.circle(50)

turtle.penup()
turtle.goto(120, 0)


turtle.pendown()
turtle.color("black")
turtle.circle(50)

turtle.penup()
turtle.goto(240, 0)
turtle.pendown()
turtle.color("red")

turtle.circle(50)

turtle.penup()
turtle.goto(60, -50)
turtle.pendown()
turtle.color("yellow")

turtle.circle(50)

turtle.penup()

turtle.color("green")

turtle.goto(180, -50)
turtle.pendown()
turtle.circle(50)

效果：