Total noob, simple script, what’s the problem?

Hey there.

i want to write a simple script that shows 2 buttons in the GUI for octave transpose.
I want to mention that I have zero experience in coding so please bear with me..
i just read through the tutorial section and here is what I came up with:


# StreamByter - Audeonic Apps

if load
set include factory standard_includes
end

set Q0 octdown +button
Set Q4 octup +button

Assign L$1 = $36


if control_q0_moved
Math L$1 = L$1 - $12
end

if control_q4_moved
Math L$1 = L$1 + $12
end

Math M1 = M1 - $36

Math M1 = M1 + L$1

what I expect the buttons to do is to alter the value of the variable in increments of 12.
since variables can’t hold negative values, I nudged the incoming midi signal down by 36 so that I can transpose three octaves before the variable hits 0. I hope that makes sense..
i can hit install and don’t get an error, but pushing a button does not do anything.
could Someone please point me to whats wrong here?

thanks!