Error in line 17... Help? All I know comes from Wikibooks. I honestly am missing the slightest clue.

If I'm understanding your program correctly, you need else and if to be one word. You'll also need an endif to end the last if-then statement.

"IF ... THEN ... ELSE ..." in plural lines should be followed by "ENDIF" In your case, "ENDIF" is necessary between line 16 and 17.

Thanks, that helped me out a LOT.

Wikibooks should not be used as a learning resource. SB is rather different from most BASICs and I see you're breaking syntax rules in multiple places. DIM PER AS INTEGER is illegal and should create a syntax error, for example. I recommend SB's official documentation instead.

It doesn't have anything against it... I've been doing fine w/ it, it's just a quick & accessible learning resource.

I've tested parts of this code and it won't compile and run. A lot of this is invalid SmileBASIC code.