[Tutor] calling function

[Howard Lawrence]

import turtle
# this part draws a square
def square():

    my_turtle = turtle.Turtle()
    my_turtle.forward(100)
    my_turtle.left(90)
    my_turtle.forward(100)
    my_turtle.left(90)
    my_turtle.forward(100)
    my_turtle.left(90)
    my_turtle.forward(100)
square()

my_turtle.forward(100)

# this is a second square
square()

   # my_turtle.forward(100)
   # my_turtle.left(90)
   # my_turtle.forward(100)
   # my_turtle.left(90)
   # my_turtle.forward(100)
   # my_turtle.left(90)
   # my_turtle.forward(100)



what is wrong with this, and how to fix it
the code is suppose to make two box but only make one
using python 3.5 idle on windows 7