Fading in and out GUI when clicking a part?

Ok. So first, insert a part into Workspace. Then insert in that part a script (not a localscript) and a clickdetector. Insert this code in the script:

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

You also have to insert a RemoteEvent in ReplicatedStorage named "FadeGui". Then, after editing your Gui in StartedGui, insert a localscript in the Gui and insert this code in the localscript:

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 begenning 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)

I made a signal for this (from a script to a localscript) cuz the scripts control SERVER events, and the localscripts just control a PLAYER'S event. So we don't want a script to change Gui objects, cuz else it will change the Gui of every players. We want to control the Gui object of a single player. To do this, I made a signal from a script to a localscript.

Hope this helped!