import math, turtle

def mySq(t, side):
    t.forward(side)
    t.left(90)
    t.forward(side)
    t.left(90)
    t.forward(side)
    t.left(90)
    t.forward(side)
    t.left(90)
    return

def myBetterSq(t, side):
    for i in range(4):
        t.forward(side)
        t.left(90)
    return

def myPoly(t, side, n):
    for i in range(n):
        t.forward(side)
        t.left(360/n)
    return

#-------- testing
alice = turtle.Turtle()
myPoly(alice, 10, 50)
alice.pencolor("blue")
alice.pensize(5)
myPoly(alice, 15, 25)
alice.pencolor("red")
myPoly(alice, 20, 10)