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import turtle import math def fractal(aturt, depth, maxdepth): if depth > maxdepth: return length = 100*((math.sqrt(2)/2)**depth) anotherturt = aturt.clone() aturt.forward(length) aturt.left(45) fractal(aturt, depth+1, maxdepth) anotherturt.right(90) anotherturt.forward(length) anotherturt.left(90) anotherturt.forward(length) if depth != maxdepth: turt3 = anotherturt.clone() turt3.left(45) turt3.forward(100*((math.sqrt(2)/2)**(1+depth))) turt3.right(90) fractal(turt3, depth+1, maxdepth) anotherturt.left(90) anotherturt.forward(length) def draw_fractal(): window = turtle.Screen() turt = turtle.Turtle() turt.hideturtle() turt.penup() turt.goto(-40, -180) turt.pendown() turt.speed(0) turt.left(90) #change the second argument to get a bigger tree! fractal(turt, 1, 2) window.exitonclick() draw_fractal()
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