import turtle as t
t.pensize(3)
t.pencolor("blue")
t.penup()
t.fd(-250)
t.seth(0)
t.pendown()
t.fillcolor("yellow")
t.begin_fill()
n=10
for i in range (3,n):
t.circle(40,steps=i)
t.penup()
t.fd(80)
t.seth(0)
t.pendown()
t.penup()
t.fd(0)
t.seth(0)
t.pendown()
t.circle(40)
t.end_fill()
原文：https://www.cnblogs.com/cnn-ljc/p/12498024.html