so im making a small tycoon and instead of using on touch bricks like most im using a GUI button system (i hope) so ive got a tycoon kit and am trying to convert the ontouch brick into a clickable GUI button, im pretty bad at lua so idk what im doing.

the problem with my button is in the output it says attempting to call a nil value (hit) on line 16,

i dont know how to fix this, i want this to work as a button to buy the part like in a tycoon

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model = workspace.Tycoon.Factory.Part2
Upgradecost = 0
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upgradeStuff = model:clone()

wait(1)

model:remove()
owner = workspace.Tycoon.Factory.OwnerName 
local ting = 0

function Click(hit)
	if ting == 0 then
	ting = 1
	check = hit.Parent:FindFirstChild("Humanoid")

	if check ~= nil then
	if hit.Parent.Name == owner.Value then
		local user = game.Players:GetPlayerFromCharacter(hit.Parent)
		local stats = user:findFirstChild("leaderstats")

		if stats ~= nil then
			local cash = stats:findFirstChild("Gold")
			if cash.Value > (Upgradecost-1) then

				cash.Value = cash.Value - Upgradecost
				upgradeStuff.Parent = script.Parent.Parent.Parent
				script.Parent:remove()

			end
		end
	end
	end

	ting = 0
	end
end

script.Parent.MouseButton1Click:connect(Click)
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