https://docs.python.org/3/library/turtle.html

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

In case, like me for years, you didn't know it was there...