Select Multiple Airplay Speakers in Music with AppleScript

It’s been a long time since I used AppleScript and I have started fooling around with it again recently. I an easy question that I know someone here can help me with. I am trying to write an applescript in Music (that I’m gonna launch from my new stream deck) to Open iTunes and start up a playlist. That is very easy to do, but I also want it to play on on three airplay devices. I know how to get it to play to one airplay device, but I am stuck on how to get it to play on multiple airplay devices. Any help would be appreciated.