How do I make my music toggle work?

So I used a variable to make a sound toggle so like

when button clicked>> set variable to variable times -1

variable = 1 then play (audio)

variable =-1 then stop all

But for some reason this just keeps resetting the song so all you hear is this glitchy noise.

And if I change it to

On start of layout

variable = 1 then play (audio)

On start of layout

variable =-1 then stop all

the toggle just doesn't work.

Please help.

I suggest you should change to boolean

Then you can toggle it true/false

And you should check the Audio is playing or not to start playing it.