图型一个

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from turtle import Turtle,Screen
def draw_polygon(haigui,n,length,k):
    for x in range(n):
        haigui.fd(length)
        haigui.left( k * 360/n)

cs = ['red','orange','yellow','green',
      'cyan','blue','purple','pink']
screen = Screen()
screen.delay(0)
t = Turtle()
t.pensize(10)
t.speed(0)
for n in range(3,10):
    t.pencolor(cs[n-3])
    draw_polygon(t,n,100,1)    
for n in range(3,10):
    t.pencolor(cs[n-3])
    draw_polygon(t,n,100,-1

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