Help with Gui troubles?

Hello! So, I'm no scripter at all, but I know a few basics. I'm trying to make a stats Gui for my place. Here's a Gyazo of the Guis I'm working with here, so it doesn't confuse you. http://gyazo.com/387a1534107ac3a84f1f4e4907d5f202

The only problem is, it's not working. I don't know how to script much, but I thought I would try working with Guis. Obviously, it was a mistake. Here's the code I wrote out.

Oh, and the Value type I'm using is a NumberValue, "0" representing that the Stats Gui is currently closed, "1" representing that it is currently open.

function onClicked()
	open = script.Parent.Open
	if open.Value == "1" then
		script.Parent.Parent.Stats.Visible = false
		script.Parent.Text = "Open Stats"
		else
			open.Value = "1"
			script.Parent.Parent.Stats.Visible = true
			script.Parent.Text = "Close Stats"
	end
end

game.StarterGui.ScreenGui.TextButton.Clicked:Connect(onClicked)

I need help fixing it, I don't know what's wrong. Try not to rewrite the whole thing, and explain as much as you can so I can understand what I did wrong.

Thanks!

Alright. So here is the script, an explanation is in the PM.

function onClicked()
    open = script.Parent.Open
    if open.Value == "1" then
	open.Value=0
        script.Parent.Parent.Stats.Visible = false
        script.Parent.Text = "Open Stats"
    else
        open.Value = "1"
        script.Parent.Parent.Stats.Visible = true
        script.Parent.Text = "Close Stats"
    end
end
 
game.StarterGui.ScreenGui.TextButton.MouseButton1Down:connect(onClicked)

Well, I commented on the variable. Also, you didn't have it change the value for lines 3 through 5. Sorry if I may have re-writed it.

pen = script.Parent.Open.Value -- I recomend this being a bool value.

game.StarterGui.ScreenGui.TextButton.Clicked:connect(function()
	if not open then
		open = true
		script.Parent.Parent.Stats.Visible = true
		script.Parent.Text = "Close Stats"
	else
		open = false
		script.Parent.Parent.Stats.Visible = false
		script.Parent.Text = "Open Stats"
	end
end)

I tried both, but neither worked. If you want you can rewrite the code and give me instructions on what to do. I'm not sure what's wrong.