How can I make a spectate camera that can flick through players?

So I want a script like in Murder Mystery, where when you click the GUI you start spectating other players, I want it so you can press a key like "q" and it will go onto the next player.

Please reply with a script, thanks!

This is a request, and you never attempted to bother showing us your attempt to make a script that can do this.

You didn't even try? You could of asked us where to start, and then maybe failed a couple times and asked us why, and then we probably would of helped.