How to make a gui appear when buying a dev product?

I know this looks like the same script but I just want to see if it works.

Put a LocalScript inside the TextButton:

local MarketplaceService = game:GetService("MarketplaceService")
local Players = game:GetService("Players")

local productID = --Dev product ID  


script.Parent.MouseButton1Click:Connect(function(promptPurchase)
    local player = Players.LocalPlayer
    MarketplaceService:PromptProductPurchase(player, productID)
end)

Put a ServerScript (Script) inside the TextButton:

local bought = script.Parent.Bought
local MPS = game:GetService("MarketplaceService")
local productID = --Dev product ID again

function processReceipt(receiptInfo)
    local player = game:GetService("Players"):GetPlayerByUserId(receiptInfo.PlayerId)
    if not player then
        return Enum.ProductPurchaseDecision.NotProcessedYet
    end

    if ReceiptInfo.ProductId == productID then
        bought.Visible = true
        bought.Text = "You have bought a DevProduct!"
    end

    return Enum.ProductPurchaseDecision.PurchaseGranted
end

MPS.ProcessReceipt = processReceipt