how to create paint program in graphics.py

I was wondering how to make a paint program exclusively from graphics.py not tkinter.py
Here is my code by I don't know how to continue it

from graphics import *
win=GraphWin('Buffet Hot Pot',1200,800)
win.setBackground('whitesmoke')
while True:
click=win.getMouse()
clickX=click.getX()
clickY=click.getY()