When you click a screen... continue?

I have made a textbutton that covers all across the screen and when you click it... here is the code,

script.Parent.MouseButton1Click:connect(function()
	game.StarterGui.ScreenGui.TextBox.Text = game.StarterGui.ScreenGui.TextBox.Text + 1
end)

Since TextBox is not a value I am confused on how I change the Text of textBox to add 1 when the textbutton (that covers the whole screen) is clicked. The problem is though is that it looks like this in explorer in studio.. game>StarterGui>ScreenGui>Textbutton>Script and then game>StarterGui>ScreenGui>TextBox... Is this right or should they both be in the same screen gui? They are both in opposite screen GUIs in the StarterGui. Is this right?

Try putting an IntValue in the Textbox then do this (Put this script in the text box too):

local Int = script.Parent.IntValue
local TextBox = script.Parent
TextBox.Text =  "" .. Int.Value
script.Parent.MouseButton1Click:connect(function()
		TextBox.Text = "" .. Int.Value +1
	end)

Try that.