Help "If" scripts and groups

[Idea]

So in essence what I'm trying to do is get a button to, when pressed, switch from one gif to another, and if pressed again back to the original. Problem is I can't seem to be able to get the "if" script function to work and I don't know the slightest thing about the new BBcode+2 function that I believe lets you group script function together? I thought it might be helpful.

Anyway, I'd be really grateful if you could help me out!

 

[Alteras]

what is the code you have so far?