sierpinski.py

# Draw a Sierpinski gasket

import turtle

def triangle(dist, order):
    if order > 0:
        triangle(dist/2, order-1)
        turtle.forward(dist/2)
        triangle(dist/2, order-1)
        turtle.left(120)
        turtle.forward(dist/2)
        turtle.right(120)
        triangle(dist/2, order-1)
        turtle.right(120)
        turtle.forward(dist/2)
        turtle.left(120)
    else:
        turtle.begin_fill()
        turtle.forward(dist)
        turtle.left(120)
        turtle.forward(dist)
        turtle.left(120)
        turtle.forward(dist)
        turtle.left(120)
        turtle.end_fill()


# Test
turtle.setup(500,500)
turtle.reset()
turtle.speed(0)
turtle.hideturtle()
turtle.penup()
turtle.goto(-200,-150)
turtle.pendown()
triangle(400,3)