I wouldn’t think you would need a switch for this, you’ll just need a variable in core keep track of where you’re at in the sequence. But you’ll get the quickest answer by asking in the core peer Assistance thread, that’s where most of the core experts hang out. Just add your question to the end of the thread and someone will help you.
Another alternative would be to set up three virtual switches, one for each state, which is how we would’ve done this a couple of years ago, but I honestly think with Core you won’t need to do that. 