Help to draw in turtle. Python

a basic piece of code:

from turtle import *

color('red', 'yellow')

begin_fill()

while True:

   forward(200)

   left(170)

   if abs(pos()) < 1:

       break

end_fill()

done()

Explanation:

What its doing is The TurtleScreen class defines graphics windows as a playground for the drawing turtles. Its constructor needs a tkinter.Canvas or a ScrolledCanvas as argument. It should be used when turtle is used as part of some application.

The function Screen() returns a singleton object of a TurtleScreen subclass. This function should be used when turtle is used as a standalone tool for doing graphics. As a singleton object, inheriting from its class is not possible.

All methods of TurtleScreen/Screen also exist as functions, i.e. as part of the procedure-oriented interface.

RawTurtle (alias: RawPen) defines Turtle objects which draw on a TurtleScreen. Its constructor needs a Canvas, ScrolledCanvas or TurtleScreen as argument, so the RawTurtle objects know where to draw.

Derived from RawTurtle is the subclass Turtle (alias: Pen), which draws on “the” Screen instance which is automatically created, if not already present.

All methods of RawTurtle/Turtle also exist as functions, i.e. part of the procedure-oriented interface.