Where should I put a "wait ()"?

Hello, here I have my upgraded instant campfire script and was wondering where to put a "wait ()" to make the player wait before they can use it again? I have my own asset so that will not be the problem.

local Tool = script.Parent
local CurrentCampfire = Tool:WaitForChild('CurrentCampfire')
local Mouse = nil

local InsertService = game:GetService('InsertService')

local CAMPFIRE_ASSET_ID = 0
local SMALL_OFFSET = Vector3.new(0, 1, 0)
local LARGE_OFFSET = Vector3.new(0, 1500, 0)

local function OnActivated()
	if Mouse then
		local character = Tool.Parent
		if character then
			local humanoid = character:FindFirstChild('Humanoid')
			if humanoid and not humanoid.Sit then	
				local hitLocation = Mouse.Hit
				local previousCampfire = CurrentCampfire.Value
				if previousCampfire then previousCampfire:Remove() end
				local campfire = InsertService:LoadAsset(CAMPFIRE_ASSET_ID):GetChildren()[1]
				CurrentCampfire.Value = campfire
				campfire.Parent = Workspace
				
				humanoid.Died:connect(function() campfire:Destroy() end)
				campfire:MoveTo(hitLocation.p + SMALL_OFFSET)
				Tool.Handle.Drop:Play()
			end
		end	
	end
end

local function OnEquipped(mouse)
	if mouse then
		Mouse = mouse
	end
end

local function OnUnequipped()
end

Tool.Activated:connect(OnActivated)
Tool.Equipped:connect(OnEquipped)
Tool.Unequipped:connect(OnUnequipped)

Adding a single delay will not prevent OnActivated from running a second time. You need to add a variable and make sure that it is true before executing the rest of the function, set it to false when it is run, and then after a delay, set it back to true.