[Tyhm]

if you put a timeout in if(created):
Serverside: it's a lot like playerenters, because created's called once Ever for the Entire Server - which is often also when a player enters - but it could hypothetically start a script for an empty room. I guess it's useful if that's what you're going for - this event's going to happen whether anyone's here to see it or not - but generally it's good practice to, if a timeout happens when playerscount<1, do nothing until playerenters.
Clientside: dangerous, as it starts the loop only once per session; if you leave the room, the timeout stalls, and when you return it doesn't re-start.