Help with this IntValue script?

game.Players.PlayerAdded:connect(function(player)
	    player.CharacterAdded:wait() --Waits until the CharacterAdded event has fired.
	    wait(1)
	    local Quest=Instance.new("IntValue") -- New IntValue
	    Quest.Parent = player
	    Quest.Name = "Quest" --Give a name to the IntValue, so you can easily identify it in other scrip
		Quest.Value=1
	end)

This works and puts a IntValue in the player, but how would I change that IntValue? I'm stuck on the parenting of Quest, bearing in mind it will be Unique for each player. I know I can do this:

Quest.Value=Quest.Value+.1

This is fairly simple.

Quest.Value = Quest.Value + 1 --Add

Quest.Value = Quest.Value - 1 --Subtract

Quest.Value = Quest.Value * 1 --Multiply

Quest.Value = Quest.Value 1/1 --Divide