How do I make a script wait until a certain in game time?

By in game time, I mean the daylight cycle time. Hey ho, I’m trying to make a script where your character changes their face automatically at night. The day and night is 600 seconds long, each btw. This is what I’ve got so far: while true do repeat —I’d assume the code I’m missing goes here— wait(1800) print(“Zombie time for another poor sap!”) script.Parent.BadBoi1.Disabled = false script.Parent.BadBoi2.Disabled = false wait(600) script.Parent.BadBoi1.Disabled = true script.Parent.BadBoi2.Disabled = true until game.Players.PlayerRemoving:Connect(function(plr) print(plr.Name.. “has left the game”) end) end

What am I missing and do I put it above the 1800 second wait and below the repeat, or somewhere else? Also if the code is screwed up for you then sorry