import turtle
turtle.speed(0)
radius = 100 # 小圆的半径
turtle.begin_fill()
turtle.circle(radius, 180)
turtle.circle(radius * 2, 180)
turtle.left(180)
turtle.circle(-radius, 180)
turtle.end_fill()
turtle.penup()
turtle.goto(0, -radius * 2)
turtle.pendown()
turtle.circle(radius * 2, 180)
# 绘制小圆圈
turtle.penup()
turtle.goto(0, radius)
turtle.pendown()
turtle.dot(25, "white")
turtle.penup()
turtle.goto(0, -radius)
turtle.pendown()
turtle.dot(25, "black")
turtle.done()
