[Python] Turtle Code from the Python website not working

Okay, went over to Python.com and loaded up this page https://docs.python.org/3.6/library/turtle.html for Turtle Coding basics.

Right there they have a code that makes a red and yellow star

from turtle import *
color('red', 'yellow')
begin_fill()
while True:
forward(200)
left(170)
if abs(pos()) < 1:
break
end_fill()
done()


Well, I tried this code myself, and it doesn't work. I get an error message saying ExternalError: TypeError: Cannot read property 'apply' of undefined on line 2

Am I missing something? I'm running Python 3.6 I believe. I gotta say, it does not inspire a lot of confidence when something from the Python website doesn't seem to work...

UPDATE

Well, I spoke to the teachers at my Python class and apparently the "Python" program we're using is slightly different than actual Python. I'm not sure but I think they said it's emulated through Javescript.or some such. So, I had to add more basic stuff like "import turtle", name a turtle, etc.

import turtle
wn=turtle.Screen
mark=turtle.Turtle()
mark.color('red', 'yellow')
mark.begin_fill()
while True:
mark.forward(100)
mark.left(170)
if abs(mark.xpos()) < 1:
break
end_fill()
done()


When I run this program, it draws one line, turns the Turtle and says, “AttributeError: 'Turtle' object has no attribute 'xpos' on line 9”

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