How do I make a GUI that only I can see?

I'm wondering how to make a GUI that only I can see when I join a server. I've seen other games where the creator says they have a GUI open but nobody else can open it, I'm wondering how to do that.

game.Players.PlayerAdded:connect(function(Visible)
if Visible.Name==("reaper5") then
game.Players[Visible.Name].PlayerGui.GUI.Gui.Visible=true
end
end)

(didn't test lol may be broke in some way)

Make a ScreenGui into StarterGui. Then Insert a Frameinto StarterGui, then a TextButtoninto the Frame. then insert a Script into TextButton MAKE FRAME NOT VISIBLE

Then type this into the script:

while true do
if script.Parent.Parent.Parent.Parent.Parent.Name == "titan111" then
script.Parent.Parent.Visible = true
else
script.Parent.Parent.Visible = false
end
end

PM Hybric if it works or not.