The Humanoid keeps waving and it doesn't stop. How do i create a debounce?

local hum = script.Parent.Parent.ShopOwner.Humanoid


local anim = hum:LoadAnimation(script.Parent.Parent.ShopOwner.WaveAnim)

function onTouch(part) 
	local humanoid = part.Parent:FindFirstChild("Humanoid") 
	
		anim:Play()
	end 


script.Parent.Touched:connect(onTouch)

local hum = script.Parent.Parent.ShopOwner.Humanoid

local db = true

local amountOFdbSECS = 3 --change it to the amount you want


local anim = hum:LoadAnimation(script.Parent.Parent.ShopOwner.WaveAnim)

function onTouch(part) 
if db == true then
db = false
    local humanoid = part.Parent:FindFirstChild("Humanoid") 

        anim:Play()
    end 
wait(amountOFdbSECS)
db = true
end

script.Parent.Touched:Connect(onTouch)