How can I smoothly tween ClockTime when round starts?

Hello, My question is how can I tween ClockTime smoothly at exact time (0) and back to 12 when round ends? I just looked everything up and I didn't found anything that could help me, everyone is doing day/night cycle when I'm trying to tween ClockTime at exact time (like in the rake) Currently my script has NOTHING about tweening or lighting so I don't see any point of adding it in here and no its not a request... I just don't know how do to this and tutorials or anything else tries to implement day/night cycle which isn't what I need...

if you really need script for that, here have it

function sortTeams()
	-- ClockTime tween 0
	wait(0.4)
	local Players = game.Players:GetPlayers()
	local localtimer = roundtime
	while localtimer > 0 do
		wait(1)
		status.Value = "Round ends in: "..localtimer.." seconds!"
		localtimer = localtimer - 1
		if localtimer == 0 then
			status.Value = "Intermission!"
		end
	end
	
	roundtime = 0
	-- ClockTime tween 12
	wait(3)
end