Beautiful carpet with turtle and python

__author__ = 'Naren'
import turtle
import random
window=turtle.Screen()
window.bgcolor('black')
def draw_square(n,color,path):
    point=turtle.Turtle()
    point.color(color)
    point.shape('turtle')
    point.speed(8)
    for i in range(1,5):
        if path=='rt':
            point.rt(90)
            point.fd(n)
        elif path=='lt':
            point.lt(90)
            point.fd(n)
        elif path=='fd_lt':
            point.fd(n)
            point.lt(90)
        elif path=='fd_rt':
            point.fd(n)
            point.rt(90)
def draw_beautiful_carpet():
    paths=['rt','lt','fd_lt','fd_rt']
    colors=['darkViolet','darkGreen','darkBlue','darkCyan','maroon','white','grey','khaki']
    for s in paths:
        for i in range(1,400,10):
            if i == 400:
                draw_square(i,'black',s)
            else:
                draw_square(i,random.choice(colors),s)

draw_beautiful_carpet()
window.exitonclick()