Easy Connect Four game with Python 3 and the Turtle module showing the winning row

This is an easy Connect Four game using Python 3 and the Turtle module. Code in link showing the winning row. I added code for checking for a four in a row win adding a bit to the difficulty of the game ( in a 5x5 and 6x7 grid). I am trying to keep it as easy as possible in order to teach coding to my kids. Feel free to look at the code for improvement/questions.

See the youtube tutorial by Keith Galli!!

[nilanpindoria]

How come the game didn't stop at 0:38 as red won?

[nilanpindoria]

do you know how to highlight the wining move (the four in the row)

[hdxcxnd]

how do you manipulate the board with an array and stuff?