What is the proper way to use UDim2.new?

local Frame = script.Parent
local Label1 = script.Parent.Label1
local Label2 = script.Parent.Label2

game.Players.PlayerAdded:connect(function(Player)
    for i=1, 800 do
        Label1.AbsolutePosition = UDim2.new(Label1.AbsolutePosition.X + 0,1,Label1.AbsolutePosition.Y + 0,0) -- This is not the proper way because the script breaks here--
        wait(1)

    end

end)