Why isnt the text label showing up when the frame fades out?

Im trying to make text to appear after the screen fades out into black but nothing is showing up.

local On = true

function touched(Part)
	if On == true and Part.Parent.Humanoid~=nil then
		On = false 
		
		
		local n = Part.Parent.Name
		
		local a = Instance.new("ScreenGui",game.Players[n].PlayerGui)
		
		local b = Instance.new("Frame",a)
		
		a.IgnoreGuiInset = true
		
		b.BackgroundColor3 = Color3.new(0,0,0)

		b.Size = UDim2.new(1000,1000,1000,1000)
		
		b.BackgroundTransparency = 1
		
		repeat 
			
		
			b.BackgroundTransparency = b.BackgroundTransparency - 0.05
			wait(0.1)
			
		until b.BackgroundTransparency <= 0
		
		
		wait(1)
		game.StarterGui.ScreenGui.e.TextTransparency = 0
		
		repeat 
			
			b.BackgroundTransparency = b.BackgroundTransparency + 0.05
			wait(0.1)
			
		until b.BackgroundTransparency >= 1
		
		a:Remove()
		On=false
		
	end
end