How do I make this reposition the GUI correctly?

local button = script.Parent --  the text button you have to press to reposition the frame
local frame = script.Parent.Parent -- the frame that I wish to move
local isopen = false
repeat wait() until button
button.MouseButton1Down:connect(function()
    if isopen == false then
        button.Text = "<" -- make the button text that you press change
        frame:TweenPosition(UDim2.new(0, 0, .3, 0), 1, "Bounce", .5) -- "opening"
        isopen = true -- make open == true since the gui has moved positions
        print("opened")
    return
    end
    if isopen == true then
        button.Text = ">" -- make the button text that you pressed change
        frame:TweenPosition(UDim2.new(0, -220, .3, 0), 1, "Bounce", .5) -- closing
        isopen = false -- make open == false because the gui is now out of the screen
        print("closed")
    return
    end
end)

Or

local button = script.Parent --  the text button you have to press to reposition the frame
local frame = script.Parent.Parent -- the frame that I wish to move
local isopen = false
repeat wait() until button
button.MouseButton1Down:connect(function()
    dbounce = false
    if isopen == false and not dbounce then
        button.Text = "<" -- make the button text that you press change
        frame:TweenPosition(UDim2.new(0, 0, .3, 0), 1, "Bounce", .5) -- "opening"
        isopen = true -- make open == true since the gui has moved positions
        print("opened")
    dbounce = true
    end
    if isopen == true and not dbounce then
        button.Text = ">" -- make the button text that you pressed change
        frame:TweenPosition(UDim2.new(0, -220, .3, 0), 1, "Bounce", .5) -- closing
        isopen = false -- make open == false because the gui is now out of the screen
        print("closed")
    dbounce = true
    end
end)

Basicly it was closing it, then following on with the code causing it to run the isopen function, i got stuck on this years ago, Its not professional to use dbounce values but if the return doesnt work thats my only way around.