Bitmap editor and File-saving

[Johnston Jiaa]

In my Python program (using Tkinter), I would like to have a window  
where the user will be able to draw a simple picture.  I don't know  
where to begin.. can somehow give me a general idea how to do  
something like this?

Also, I'd like for the program to save that picture along with some  
text.  What would be the best way to go about doing this?  Is  
pickling a viable option?

Thanks in advance,
Johnston