Python und Sierpinsky - rekursiv und flott

#!/usr/bin/python3.10
#
# Sierpinsky in Python mit Turtle und Farben
#

import turtle
Color = {"Purple":"#A46BFF","Aqua":"#56BCE8","Tree":"#5EFF7A","Summer":"#E8A83A"}
C = ["#A46BFF","#56BCE8","#5EFF7A","#E8A83A","#555555","#777777"]

def draw_sierpinski(length,depth):
    if depth==0:
        for i in range(0,3):
            t.forward(length)
            t.left(120)
    else:
        t.color(C[depth])
        draw_sierpinski(length/2,depth-1)
        t.color(C[depth])
        t.forward(length/2)
        draw_sierpinski(length/2,depth-1)
        t.color(C[depth])
        t.back(length/2)
        t.left(60)
        t.forward(length/2)
        t.right(60)
        draw_sierpinski(length/2,depth-1)
        t.color(C[depth])
        t.left(60)
        t.back(length/2)
        t.right(60)

window = turtle.Screen()
window.title("Sierpinsky")
window.setup(800, 800)
turtle.setworldcoordinates(-10, -10, 810, 810)
t = turtle.Turtle()

#draw_sierpinski(100,2)
#draw_sierpinski(200,3)
draw_sierpinski(500,5)
window.exitonclick(