Getting 1 random number?

for i,v in pairs(game.Workspace:GetChildren()) do
	if v.Name == "Lava" or v.Name == "TeleportPad" then
		v.Touched:connect(function(hit)
			local player = game.Players:GetPlayerFromCharacter(hit.Parent)
			if player ~= nil then
				local number = math.random(1, 5)
				if number == 1 then
					ad = script.RunAd:Clone()
					ad.Parent = player.PlayerGui
					ad.Disabled = false
				end
			end
		end)
	end
end

I want this to get just 1 random number, between numbers 1 - 5, but it gives out lik 10 numbers, for example 2, 5, 3, 3, 3, 2, 4, 1, 2, 5 How can I get it so it just gives 1 random number?