How do I put a Text GUI above the Player's head?

I've been trying to put a GUI above a player's head that says his/her rank according to a script. This is the part of the script that assigns the ranks:

	 rank.Name = "Rank"
	 rank.Parent = leaderstats
	 if newPlayer.Name == "DevSupremecy" then
		rank.Value = "Chief Developer"
		texta.Text = ("Chief Developer")
	 elseif newPlayer.Name == "Dev_Noobity" then
		rank.Value = "Game Owner"
		texta.Text("Game Owner")
	 elseif newPlayer.Name == "CordeliaImperius" then
		rank.Value = "Head of Administration"
		texta.Text = "Head of Administration")
	 elseif newPlayer.Name = "Bigreddino556" or "XavierVernalls" then
		rank.Value = "Developer"
		texta.Text = ("Developer")
     elseif newPlayer.Name = "Player1"
		rank.Value = ("Studio")
		texta.Text = ("Studio")
 	 else
		rank.Value = "Guest"
		texta.Text = ("Guest")				
	end

And this is the part of the script that sets up the GUI:

	 local gui = Instance.new("BillboardGui")
		gui.Parent=newPlayer.Character.Head
		gui.Adornee=newPlayer.Character.Head
		gui.Size=UDim2.new(2,0,.78,0)
		gui.StudsOffset=Vector3.new(0,2,0)
		local texta=Instance.new("TextBox")
		texta.Size=UDim2.new(1,0,1,0)
		texta.BackgroundTransparency = 1
		texta.BackgroundColor3 = Color3.new(0, 0, 0)
		texta.BorderColor3 = Color3.new(0, 0, 0)
		texta.TextColor3 = Color3.new(1, 1, 1)
		texta.BorderSizePixel = 1
		texta.TextScaled = false
		texta.TextStrokeTransparency = 1
		texta.FontSize = Enum.FontSize.Size18
		texta.Parent=gui
		wait(5)

Is there something wrong with the IF-ELSEIF-ELSE statements?