How do I create an announcement from an ingame purchase?

local MS = game:GetService("MarketplaceService")
b = nil
MS.ProcessReceipt = function(e)
	print("wwww")
	local b = e
	local suc,emsg = pcall(function()
		local e = b
local info = MS:GetProductInfo(e.ProductId,Enum.InfoType.Product)
local gui = Instance.new("ScreenGui",script)
gui.Name = "PlayerPurchase"
		local text = Instance.new("TextLabel",gui)
text.Text = game.Players:GetPlayerByUserId(e.PlayerId).Name .. " just bought " .. info.Name .. " for " .. info.PriceInRobux .. " Robux!"
		text.Size = UDim2.new(1,0,0.05,0)
		text.Font = Enum.Font.SourceSansLight
	text.BackgroundColor3 = Color3.new(1,1,1)
		text.BorderSizePixel = 0 
		text.TextScaled = true
local players = game.Players:GetChildren()
local guis = {}
for i = 1, #players do
local b = gui:Clone()
table.insert(guis,b)
b.Parent = players[i].PlayerGui
end
wait(5)
for i = 1, #guis do
guis[i]:Destroy()
		end
	end)
	if suc then
		return Enum.ProductPurchaseDecision.PurchaseGranted
	else
		warn(emsg)
		return Enum.ProductPurchaseDecision.NotProcessedYet
	end
end

Remember: We help with scripting, we don't script your game.

Note: found out it doesn't work, fixing

Edit: fixed