# -*- coding: utf-8 -*-
import random as rd
import turtle as tt
win = tt.Screen()
######
tt.setup(0.85, 0.85)
tt.shape("turtle")
tt.speed(0)

color = ['blue','red','green','black']
for i in range(1,50):
    tt.pencolor(color[i%4])
    tt.fd(i*5)
    tt.lt(90)


######
win.exitonclick()