#!/usr/bin/env python3
from turtle import Pen


def draw_ornament(pen, scale=150):
    if scale > 1:
        for angle in range(0, 360, 90):
            pen.setheading(angle)
            back = pen.pos()
            if scale <= 10:
                pen.pd()
            pen.forward(scale)
            draw_ornament(pen, scale // 2)
            pen.pu()
            pen.setpos(back)

def setup_pen():
    pen = Pen()
    pen.ht()
    pen.pu()
    pen.speed(0)
    pen.screen.setup(1000, 900)
    pen.screen.title("Watch me running")
    pen.screen.bgcolor("white")
    pen.screen.tracer(n=10) # draws only nth frame to speed up drawing
    pen.color("blue")
    pen.setpos(0, 0)
    return pen

if __name__ == '__main__':
    pen = setup_pen()
    try:
        draw_ornament(pen)
    except KeyboardInterrupt:
        exit()
    input('All done!\nPress Enter to quit')
    exit()