TextLabel not showing up?

I made a script to show a GUI changing texts giving people, who click the "Play"button, information. It used to work before, now it won't. After I changed one of the texts, it broke.

All the GUIs start off Visible.

mouse = game.Players.LocalPlayer:GetMouse()
txt = script.Parent.TextLabel
script.Parent.MouseButton1Click:connect(function()
	game.Players.LocalPlayer.CameraMaxZoomDistance = 0.5
	script.Parent.Visible = false
	txt.Text = "Okay, " ..game.Players.LocalPlayer.Name.. "."
	wait(5)
	txt.Text = "Your task is simple."
	wait(5)
	script.Parent.Sound:Play()
	txt.Text = "Run from him."
	wait(3)
	txt.BackgroundTransparency = 0.1
	txt.TextTransparency = 0.1
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.2
	txt.TextTransparency = 0.2
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.3
	txt.TextTransparency = 0.3
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.4
	txt.TextTransparency = 0.4
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.5
	txt.TextTransparency = 0.5
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.6
	txt.TextTransparency = 0.6
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.7
	txt.TextTransparency = 0.7
	wait(0.0000000001)
	txt.BackgroundTransparency = 0.8
	txt.TextTransparency = 0.8
	wait(0.0000000001)	
	txt.BackgroundTransparency = 0.9
	txt.TextTransparency = 0.9
	wait(0.0000000001)
	txt.BackgroundTransparency = 1
	txt.TextTransparency = 1
	mouse.Icon = "rbxassetid://240302586"
end)

There is nothing in the output. Could somebody help me out with this?