This will constantly put "Message!" on the screen. WHILE and WEND are the start and end of a WHILE loop. WHILE takes a condition to check every time it repeats, but TRUE just makes it repeat forever. But wait: how do you stop a program stuck in an infinite loop?! Just use the START button again. If you want to save a program you made, just hold down L (or R) and tap SAVE. Hope this helped!