How do i make it so that when i click a part a fading in and out gui appears?

I've been trying to make it so that when you click a part there's a black gui that fades in and fades out for a week and could'nt make it. I've tried using this script wich i put in the GUI

local debounce = false
local faded = false

game.ReplicatedStorage.FadeGui.OnClientEvent:Connect(function()
    if debounce == false then
        debounce = true
        if faded == false then
            faded = true
            for i = 0, 1, 0.05 do
                script.Parent:WaitForChild(THE GUI OBJECT YOU WANNA FADE).BackgroundTransparency = i
                wait(.05)
            end
            return -- returning to the beginning of the function to not run the following lines, after setting "faded" to true
          else
            faded = false
            for i = 1, 0, -0.05 do
                script.Parent:WaitForChild(THE GUI OBJECT YOU WANNA FADE).BackgroundTransparency = i
            wait(.05)
        end
        debounce = false
    end
end)

And then i put this script in the part

script.Parent.ClickDetector.MouseClick:Connect(function(Character)
game.ReplicatedStorage.FadeGui:FireClient(game.Players:WaitForChild("Character.Name")) -- Making a signal
end)

But it didn't work. Then i tried using this script but when i change it it stops working:

--< Variables >
local part = game.Workspace.ClickMe

local frame = script.Parent.Frame 

local db = false 

local TimeBetweenFade = 3 
--< Set up >
frame.BackgroundTransparency = 1
frame.Visible = true
--< Event >
part.ClickDetector.MouseClick:Connect(function() 
	if not db then 
		db = true
		
		for i = 1,0,-0.1 do
			frame.BackgroundTransparency = i
			wait(0.01)
		end
		 		
		print("Faded In") 
		
		wait(TimeBetweenFade)
		db = false 
		 
		for k = 0,1,0.1 do
			frame.BackgroundTransparency = k 
			wait(0.01) 
		end
		
		print("Faded out") 
		
		
	end
end)

Example, if i change the TimeBetweenFade, it stops working. Could anyone please tell me how to do it. Oh and just to clarify, these aren't my scripts, I just found them.