分形图形

 1 import turtle
 2 
 3 def a_line(len,n):
 4     if n==0:
 5         turtle.fd(len)
 6     else:
 7         for i in [0,60,-120,60]:
 8             turtle.left(i)
 9             a_line(len/3,n-1)
10 
11 lenth = 500
12 level = 5
13 b = 120
14 def c():
15     turtle.pensize(1)
16     turtle.pencolor('green')
17     turtle.speed(0)
18     turtle.penup()
19     turtle.goto(-300,200)
20     turtle.pendown()
21 
22     a_line(lenth,level)
23     turtle.right(b)
24     a_line(lenth, level)
25     turtle.right(b)
26     a_line(lenth, level)
27     turtle.right(b)
28 
29     turtle.hideturtle()
30     turtle.done()
31 
32 c()