How do I make a gui show up for only the player that interacts with the click detector?

So, this is how I did it.

local brick = script.Parent
local cD = script.Parent.ClickDetector
local deb = false

cD.MouseClick:Connect(function(hit)
	if hit:IsA("Player") and deb == false then
		deb = true
		local player = game:GetService("Players"):FindFirstChild(hit.Name)
		local playerGui = player:WaitForChild("PlayerGui")
		playerGui.Fade.Frame.Visible = true
		playerGui.Fade.Frame.BackgroundTransparency = 0.9
		wait(0.1)
		playerGui.Fade.Frame.BackgroundTransparency = 0
		wait(3)
		for i = 0.1,1,0.1 do
			playerGui.Fade.Frame.BackgroundTransparency = i
			wait()
		end
		wait()
		playerGui.Fade.Frame.Visible = false
		deb = false
	end
end)

First, I set up the variables.

Next, I setup my function for when the player clicks the button and sets a variable equal to the player in the service Players.

After that, I just did what you did.

One thing is that for the for i loop, don't put the PlayerGui.Fade.Frame.Visible = false in there because it will go invisible after one millisecond and the animation won't play. Just a heads up. Same for the debounce, and I'd recommend using wait() instead of wait(0.1) because wait() runs more smooth. Or, you can go advanced and use RunService and do renderstepped and everytime a frame plays it decreases background transparency by 0.1, but yeah. I'd also recommend for when you do .1 to do 0.1 to make it easier when you're looking for 0.1. But, it's all up to you whether you want to do it or not.

Hope this helped, if it worked let me know and put this as an answer. If it didn't work, let me know so I can fix it and help you.

This is what the part looks like. (https://gyazo.com/181323788a05777da252a08cac1f4914)