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#KochDrawV2.py
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import turtle
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def koch(size, n):
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if n == 0:
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turtle.fd(size)
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else:
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for angle in [0, 60, -120, 60]:
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turtle.left(angle)
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koch(size/3, n-1)
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def main():
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turtle.setup(600,600)
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turtle.penup()
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turtle.goto(-200, 100)
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turtle.pendown()
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turtle.pensize(2)
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level = 3 # 3阶科赫雪花，阶数
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koch(400,level)
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turtle.right(120)
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koch(400,level)
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turtle.right(120)
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koch(400,level)
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turtle.hideturtle()
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main()
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