Destroy gui via script help? and, click giver help?

I need to destroy a billboard gui with a script so basically i put a billboard gui, a click detector, and a local script in an object and i want to destroy the billboard gui when i click the object ( heres my failed code )

function onClicked ()
	script.Parent.BillboardGui:Destroy()
end
script.Parent.ClickDetector.MouseClick:connect(onClicked)

onClicked()

alright so for my click giver script , i put the code in the same script as the one for the destroy gui script above. it goes somewhere along the lines of this ( it doesnt work, what did i do wrong )

local debounce = false
function onClick()
	if debounce = false then
		Lighting.Tool:clone().Parent = player.Backpack
	end
end

onClick()

my tool is in lighting . sorry if this is suppose to be super easy but i just started scripting and gotten a small hang of it some of the code is copied from some free models and yeah. thanks for reading