Local Script Help?

Here's the script.

1. Make a GUI and insert a Textbutton
2. Change the text of Textbutton to "Open"
3. Inside a Frame in the GUI together with the Textbutton.
4. Make a script or localscript >IN< the Textbutton (it's better to make it script so that it would take small loading time)

local button = script.Parent --Remove local if it's in a localscript
Open = false

button.MouseButton1Down:connect(function()
	if Open == false then
		Frame.Visible = true
		Open = false
		button.Text = 'Close'
	elseif Open == true then
		Frame.Visible = false
		Open = true
		button.Text = 'Open'
	end
end)