How do I track how long LocalPlayer has been playing in seconds and minutes?

local Player = game.Players.LocalPlayer
local Label = Player.PlayerGui:WaitForChild("ScreenGui").TextLabel
local InGame = 0
while true do
	InGame = InGame+1
	if InGame < 10 then
		Label.Text = "0:0"..tostring(InGame)
	else if InGame < 60 then
		Label.Text = "0:"..tostring(InGame)
	else if InGame >= 60 then	
				local minutes = math.floor(InGame/60)
				local sec = InGame-minutes*60
				if sec < 10  then
					Label.Text = tostring(minutes)..":0"..tostring(sec)
				else
					Label.Text = tostring(minutes)..":"..tostring(sec)
				end
			end
		end
	end
	wait(1)
end