Black Screen Fade In on Death and Out on Respawn?

I want a black screen to fade in once the player has died and to fade out once they respawn. I've made a start and it doesn't seem to be appearing.

I have put a ScreenGui in the 'StarterGui' called 'BlackScreen', then a Frame inside the ScreenGui called 'Black' and then a LocalScript inside the Frame with the following:

local black = script.Parent
local humanoid = game.Players.LocalPlayer:FindFirstChild('Humanoid')

while true do
	if humanoid.Died() then
		for i = 1, 10 do
			black.BackgroundTransparency = black.BackgroundTransparency - 0.10
			wait(.1)
		end
	end
	if humanoid == 100 then
		for i = 1, 10 do
			black.BackgroundTransparency = black.BackgroundTransparency + 0.10
			wait(.1)
		end
	end
	wait(1)
end

local black = script.Parent
local humanoid = game.Players.LocalPlayer:FindFirstChild('Humanoid')

humanoid.Died:connect(function()
        for i = 1, 10 do
            black.BackgroundTransparency = black.BackgroundTransparency - 0.10
            wait(.1)
        end
    if humanoid.Health == 100 then
        for i = 1, 10 do
           	 black.BackgroundTransparency = black.BackgroundTransparency + 0.10
          	  wait(.1)
        	end
    	end
end)

Here try this