A Language improvement section

[TerryRitchie]

PCOPY 0, 1' make a copy of the screen
Print "Whatever you want on the screen"
SLEEP 'Give time for the user to see the screen.  Delay and such also can work here, or a user input prompt...
PCOPY 1, 0 'restore the screen to the copy you made before

I recently added PCOPY under the "SCREEN Pages and Flipping" section in Lesson 5 if you need a quick intro to PCOPY.

Oops, I didn't publish it yet. I'll finish that up today and get it posted.