RosettaCodeData/Task/Sierpinski-triangle-Graphical/Python/sierpinski-triangle-graphical-1.py

# likely the simplest possible version?
import turtle as t
def sier(n,length):
    if (n==0):
        return
    for i in range(3):
        sier(n-1, length/2)
        t.fd(length)
        t.rt(120)