How do you make a Gui appear when you die?

How about instead of using a while true do end loop, why not use the .Died event? Heres what I mean;

repeat wait() until game.Players.LocalPlayer and game.Players.LocalPlayer.Character and game.Players.LocalPlayer.Character:FindFirstChild("Humanoid") --I like to use this to wait for the requirements; this will repeat waiting until the Player spawns, the Player's Character spawns, and the Humanoid spawns within the Player's Character
local Player = game.Players.LocalPlayer --This is the Player
local character = Player.Character --This is the Player's Character
local health = character.Humanoid --This is the Player's Humanoid within Character

health.Died:connect(function() --Here is the `.Died` event; this will fire when the Player has died
script.Parent.Visible = true --It will enable the Visibility for the Gui
end) --This `end)` ends the `.Died` event; ends the code; ends the code block

Hope this helped!