How do I debounce my GUI?

Ok I have a Teleporting GUI that has a black screen fade in Teleport the player and then Fade out. I works fine but the problem is that if you spam click the gui it keeps redoing the fading in and teleporting for the amount of times clicked. I want help with making a script that keeps the Player click more then one time.

Debounce

Debounce is a method used to disable (and I use that term loosely, so all you fellow scripters out there, leave me alone) a block of code from being ran temporarily, so if something tries to run that block of code again before it finishes the first time, it simply won't do anything.

This entire concept is most commonly done with boolean logic, though technically you could use anything to debounce that section of code as long as you can keep it between two values.

Example

The point of this is, to make it so the code won't run if it's condition is set to one value, and at the end of the code, change it so it no longer has that barrier. Here's an example:

local Disabled = false

local function Test()
	if Disabled then -- If Disabled is set to true, then...
		return -- end the code here by returning nothing.
	end

	Disabled = true -- if Disabled is false, then the if statement above won't run, which brings us here, allowing us to make "Disabled" true, which is what will stop this function from running again before it's initial call is over.
	
	-- Code
	print("Not disabled")

	-- How long until we toggle our debounce (allowing the function to be ran again)
	wait(1)

	--  Now we remove that barrier after 1 second, so the function may be called again
	Disabled = false
end

-- Call this function every half a second (remember our debounce cooldown is 1 second).
while wait(0.5) do

	spawn(Test) -- "spawn" will make it so we can run the code inside the function while also moving to the next line of code, allowing us to run multiple things at once (much like events for objects). Though, the logic behind this goes into explaining coroutines, which you should save for another time.

end

You will see that the code above will only print Not disabled every 1 second, instead of every half second (at the speed our loop runs the code).

You can use this exact same method in your script, perhaps toggling your debounce after your for loop (or whatever loop you're using) has ended (for your GUI transparency transitioning).

Sources

More on debounce: http://wiki.roblox.com/index.php?title=Debounce

The spawn function: http://wiki.roblox.com/index.php?title=Function_dump/Functions_specific_to_ROBLOX#Spawn

More on coroutines: http://wiki.roblox.com/index.php?title=Beginners_Guide_to_Coroutines#Spawn

If you have any questions, or need any help, just let me know.

An easier to read answer This code allows you to make an object when you press z every wait(3) seconds

Active = true
function onKeyPressed(input,Gamestuff)
if input.KeyCode == Enum.KeyCode.Z then
if Active then
local g= Instance.new("Part",game.workspace)
-- Space
g.CFrame = game.Players.LocalPlayer.Character.Torso;
Active = false;
wait(3)-- debounce effect
g:Destroy()-- destroy part before set active to true
Active = true
end --end of the debounce if
end-- end of if for key Code
end-- end of function
game:GetService("UserInputService").InputBegan:connect(OnkeyPressed)