Okay, In tutorial #3 "The Screen Switcher" the first step is to enter the checklist function to create a list of the available display modes. However, that checklist goes into available memory, so you won't see anything if you press F5 until you have completed step #2, or the FOR T=1 TO CHECKLIST QUANTITY() and the PRINT stuff. After you pass step 2 there, you can then press F5 and see the list as displayed on the screen. (If you don't see the list and fall to the CLI interface, come back and tell us.)
S.
Any truly great code should be indisguishable from magic.