# David Powis-Dow CS 101:Python 
# 2016-10-31 v0.1
# Chapter 3 : Exercise 6 - Turtle regular polygons  

import turtle
wn = turtle.Screen()
wn.bgcolor("lightgreen") 
alex = turtle.Turtle()
alex.shape("turtle")
alex.color("blue")
size = 20

for t in range(3):          
    alex.forward(50)
    alex.left(120)

wn = mainloop()


