Tween Position Issues

function notify(txt,who,style,interval,interval2)
    plr = game.Players:FindFirstChild(who)
    print("Starting...")
    if plr~=nil then
        print("Player found!")
        gui = plr.PlayerGui:findFirstChild("Notify")
        if gui~=nil then
            print("Gui found!")
            iu = gui.Main.InUse
            if iu.Value == false then
                print("Not in use!")
                iu.Value = true
                gui.Main.Button.Text = txt.."!"
                gui.Main:TweenPosition(UDim2.new(0.25,0,0.3,0),"Out",style,interval,false)
                wait(interval2)
                gui.Main:TweenPosition(UDim2.new(0.25,0,-0.3,0),"In",style,interval,false)
                wait(interval)
                iu.Value = false
            elseif iu.Value == true then
                print("In use, waiting..")
                repeat
                    wait(1)
                until
                iu.Value == false
                iu.Value = true
                gui.Main.Button.Text = txt.."!"
                gui.Main:TweenPosition(UDim2.new(0.25,0,0.3,0),"Out",style,interval,false)
                wait(interval2)
                gui.Main:TweenPosition(UDim2.new(0.25,0,-0.3,0),"In",style,interval,false)
                wait(interval)
                iu.Value = false
            end
            print("Done!")
        end
    end
end