How to make Gui Tweens smooth, is it possible?

Here is the current script for tweening but Its not smooth animation it's just laggy. Wpuld interpolation help, and how would I do it? Thanks!

repeat wait() until script.Parent.Loading.Text == "100% Loaded"
if script.Parent.Loading.Text == "100% Loaded" then
    script.Parent.Loading.Text = "Loaded Sucessfully"
    wait(0.5)
    script.Parent.Box:TweenPosition(UDim2.new(2, 0,0.17, 0), "Out", "Bounce", 5, false)
    script.Parent.Loading:TweenPosition(UDim2.new(2, 0,0.17, 0), "Out", "Bounce", 5, false)
    wait(1.6)
    script.Parent.Backframe:TweenSizeAndPosition(UDim2.new(0.3,150,0.4,42), UDim2.new(0.3,0,0.4,-63))
    script.Parent.Frame.Visible = true
    wait(2)
    script.Parent.Box:Destroy()
    script.Parent.Loading:Destroy()
end