Print 1 to 15, using different printers

Pyth + ///, 15 bytes - 10 = 5

pPt`S15", STOP!

This prints 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, STOP! in Pyth, by taking range(1,15+1) and stripping off the start and end brackets, and printing it immediately followed by ", STOP!".

The next fourteen programs are in ///, which directly outputs all programs that don't contain / or \. So the second program

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

gives 2 and the third program 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. The penultimate program, 15, STOP!, prints 15, STOP!, so the last program is just STOP!.

JavaScript, 131238 - 10 = 131228 bytes

The naive approach turned out worse than expected. In hindsight I should have expected it. But I thought I'd share it anyway. Full code here.

Idea: Iteratively escaping and adding the N-1, ...

alert("14,alert(\"15, alert(\\\"STOP!\\\")\")")

CJam, 26 25 24 bytes

1{", "2$)@"_~"](_F<@*}_~

Try it online.

The subsequent programs simply have the first number incremented. This runs the program 16 times.

---

Or with bonus for the same score:

1{", "\2$)_G<\@`+"_~"+"STOP!"`?}_~

Try it online.

The subsequent programs simply have the first number incremented. This runs the program 16 times.

Alternative solution for the bonus:

1{", "\2$)Gmd@`+"_~"+"STOP!"`\?}_~