how to debounce InputBegan and InputEnded?

I'm just starting with lua coding, so the code can be very poorly written, but how to debounce this? I'm already tried several ways that turned out to be a failure so I decided to write about it here.

UIS.InputBegan:Connect(function(key,gameProcessed)
if gameProcessed then return end
	if key.KeyCode == Enum.KeyCode.Z then
            char = plr.Character or plr.CharacterAdded:Wait()
		    hum =  char:WaitForChild('Humanoid')
			if  char then anim = hum:LoadAnimation(animInst) end
			anim:Play()
			anim.KeyframeReached:connect(function(keyframename)
				if keyframename == 'Pause' then
					anim:AdjustSpeed(0) 
				end
		end)
    end
end)
UIS.InputEnded:Connect(function(key,gameProcessed)
	if gameProcessed then return end
	    if key.KeyCode == Enum.KeyCode.Z then
			anim:Stop()
			castMagic(plr, mouse.Hit.Position)
    end
end)

In order to implement debounce, you need to have a variable that is set to something. You then set the function to require the debounce to have that originally set "something". In the function, you'll change the debounce to something else.

So in the example below, I have a debounce variable set to false at the beginning.

local debounce = false

if debounce == false then
	debounce = true
	print("Function Executed") -- Output: "Function Executed"
	wait(3)
	debounce == false
end

If this helped, consider accepting this answer. If not, comment below and I'll be sure to help you out further.