How would I turn this into a functioning script? (Game Passes)

wait(0.5)
local player = game.Players.LocalPlayer
local tool = game.Lighting:FindFirstChild("Burger")
local productId = 20580787

script.Parent.MouseButton1Click:connect(function()
	while true do
	local g = Game:GetService("MarketplaceService"):PromptProductPurchase(player, productId)
	wait()
		if g.PurchaseAccept == true then
		local a = tool:clone()
		a.Parent = player.Backpack
			else
			print"nope"
		end
	wait()
	end

end)

How would I turn this into a functioning script, I would only want to give the tool out to the player if the purchase is accepted, because this gives it before the player click "OK" on the ROBLOX GUI which pops up.

I also have something like this:

wait(0.5)
local player = game.Players.LocalPlayer
local tool = game.Lighting:FindFirstChild("Burger")
local productId = 20580787

script.Parent.MouseButton1Click:connect(function()
g=Game:GetService("MarketplaceService"):PromptProductPurchase(player, productId)
	repeat until g.ProductPurchaseDecision=='PurchaseGranted'
	local a = tool:clone()
	a.Parent = player.Backpack
end)