the screen is not right

[woodylcy]

No matter How quickly I release the key, the whole screen will be written to black, then recover to white. I mean I just don't want to make the whole screen white or black at one time.  

Thanks for your help. I am beginner here

[cadet1620]

It's a bit hard to guess what's going wrong with your code without seeing it.  If you email it to me (More button: Reply to Author) I'll be happy to look at it for you.  Please don't post it on the forum; it's against forum etiquette to post entire programs/hdls.

--Mark