[Coco] Example basic code for screen grid.

[haywire666 at aol.com]

I need some example code in basic for coloring the screen black, then creating a grid of sorts where I can turn 
some parts of the screen white or back to black...


Ideally this should work on a coco1,2, or 3 because I may just use a coco2 for this hardware project of sorts.


I've been away from cocos for very long, so I'm still struggling to get what I want, which would be small squares 
on a grid of sorts turning from black to white. I need to control the dots on the grid individually. They would all normally be 
black but white would be "on" for my purposes.


Any suggestions of advice, I'm all ears... Ideally, I'd like a grid with 24 or so squares I could turn from black to white and vice versa.


Best regards,

Steven