Adding code to AHK Script

Hey I recently started using auto hot key scripts and I was planning on adding a piece of code but I have no fucking clue how. I have zero experience in coding and I just wanted to literally copy and paste a piece into my AHK. I'm using Pean's multiscript v2 and I want to make it so you automatically stop when shooting. I found a piece of code that does that but I don't know where to add it and whenever I try, I get an error. Any help is appreciated.

I suggest you to look around on YouTube and see if there is any tutorials on AHK scripts.