Help with variable ints!

[Radical Batz]

I'm kinda getting confused sometimes with if(GetLocalVarInts

and I kinda want some help form you guys to teach me how to exactly use them pls! or where to place them.

I'm kinda making this code where you have a dirty container and if you turn the wheel on the water barrel it will display a message "I must put the container first" so then when you put the container, you can turn the wheel and you have cleaned the container and now you can use it on the other barrels, but that code is already done.

So this is the confusing part, if you haven't used the container on the water barrel yet and try to place the container on the floor under the other barrels it will display a message "I must clean the container first" so you're supposed to use it on the water barrel first and when you used it on the water barrel then now you can place the container under the other barrels! that's all but it's kinda confusing to me when I do the "if(GetLocalVarInts"
so if you guys can help me then I would be really appreciated!