rotate number given as command line argument

turtle_rotating_squares.py

import turtle
import random
import sys

def r():
        return random.randint(0, 255)

screen = turtle.Screen()
screen.bgcolor("#fff")
screen.colormode(255)

tosba = turtle.Turtle()

tosba.color("#f00")
tosba.pensize(5)
tosba.speed(0)
tosba.hideturtle()
loop = int(sys.argv[1])

for i in range(loop):
        tosba.color(r(),r(),r())
        for i in range(4):
                tosba.rt(90)
                tosba.fd(100)
        tosba.rt(360/loop)

tosba.hideturtle()
turtle.getscreen()._root.mainloop()