How do I tween a Gui that when you hover over appears?

I've managed to make a gui that when you hover over a door it will make a Gui visible. I don't like the way the Gui just pops into existance so I tried tweening it. Didn't work out too well. This is my attempt at tweening;

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local frame = script.Parent:WaitForChild('FrameGUI')
local toggle = false
local Door = 
--LIST OF IN GAME DOORS--
            game.Workspace.Door1.Door.Clickbox or
            game.Workspace.Door2.Door.Clickbox
--LIST OF IN GAME DOORS--

Mouse.Move:connect(function()
    if Mouse.Target and Mouse.Target == Door then
        Player.PlayerGui.DoorGui.SpecialHoverGui.Visible = true
    elseif Mouse.Target and Mouse.Target ~= Door then
        Player.PlayerGui.DoorGui.SpecialHoverGui.Visible = false
    end
end)


Mouse.Move:connect(function()
 if script.Parent.Visible == false then
  frame:TweenPosition(UDim2.new(0.5,-250,0.5,-200), 'Out', 'Bounce', 1)
  script.Parent.Visible = true
 else
  frame:TweenPosition(UDim2.new(0.5,-250,1.7,-200), 'Out', 'Bounce', 1)
  script.Parent.Visible = true
 end
end)