Why isn't debounce working on Clickdetector?

I have been trying on and on to getting a clickdetector to work once before a timer stops and is clickable again. I tried for a really long time yesterday until finally I am getting help here. Anyways heres the script:

clicker = script.Parent
local debounce = true
clicker.ClickDetector.MouseClick:Connect(function(player)
	if debounce == true then
		debounce = false
		wait(2)
		local models = game.Lighting.Models:GetChildren()
		local randomModel = models[math.random(1,#models)]
		local modelClone = randomModel:Clone()
		modelClone.Parent = game.Workspace
		wait(20)
		debounce = true
end)

#Simple fix:

You forgot an end at the end of the if statement.

#Shorten your code:

You could actually just do:

if debounce then
	--CODE HERE
end