How come this Tweening script only tweens once and then doesn't work?

This tweening script I just made only tweens once. I've checked it multiple times, and it should keep switching the values to true and false and opening and closing. Help! Also, it doesn't say 'Open Teleports!' when it should. I think there's a problem in the else.

Player = game.Players.LocalPlayer
PlayerGui = Player.PlayerGui
ScreenGui = PlayerGui:WaitForChild("ScreenGui")
Button = ScreenGui:WaitForChild("OpenClose")
ButtonBacking = ScreenGui:WaitForChild("ButtonBacking")
Open = false
local toggle = false

Button.MouseButton1Down:connect(function(open)
    if toggle == false then
ButtonBacking:TweenPosition(UDim2.new(0.5, -250, 0.5, -200), 'Out', 'Bounce', 2)
Button.Text = 'Close Teleports'
toggle = true
    else
ButtonBacking:TweenPosition(UDim2.new(1.5, 0, 0.1, 0), 'Out', 'Bounce', 2)
Button.Text = 'Close Teleports'
toggle = false
    end
end)

Thanks!