help me with text label script?

this is a script when you buy an item an label will pop up and it does not help me please.

p = script.Parent.Parent.Parent.Parent.Parent.Parent.Parent

function buy()
			game.ReplicatedStorage["Cheezburger"]:clone().Parent = p.Backpack
			wait(1)
			script.Parent.Parent.Parent.Parent.Visible = false
			
			wait(1)
			
			game.startergui.Waiter.Frame.Visible = true
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "H"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Ho"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hop"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope y"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope yo"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you e"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you en"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enj"
			wait(0.1)
		    game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjo"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy t"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy th"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy the"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy the m"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy the me"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy the mea"
			wait(0.1)
			game.StarterGui.Waiter.Frame.TextLabel.Text = "Hope you enjoy the meal"
			wait(1)
			game.StarterGui.Waiter.Frame.Visible = false
end

script.Parent.MouseButton1Click:connect(buy)

Im gonna try to fix it, if it does not work, it probably means something is missing. Post the output if it stills does not work.

p = script.Parent.Parent.Parent.Parent.Parent.Parent.Parent

local function buy()
           local partToClone = game.ReplicatedStorage:FindFirstChild("Cheezburger")
	   local Clone = partToClone:Clone()
	   Clone.Parent = p.BackPack
local gui =	p.PlayerGui.Waiter
            wait(1)
            script.Parent.Parent.Parent.Parent.Visible = false
            wait(1)
           gui.Frame.Visible = true
            wait(0.1)
           gui.Frame.TextLabel.Text = "H"
            wait(0.1)
            gui.Frame.TextLabel.Text = "Ho"
            wait(0.1)
            gui.Frame.TextLabel.Text = "Hop"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope"
            wait(0.1)
          gui.Frame.TextLabel.Text = "Hope y"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope yo"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you"
            wait(0.1)
          gui.Frame.TextLabel.Text = "Hope you e"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you en"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enj"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjo"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjoy"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjoy t"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjoy th"
            wait(0.1)
            gui.Frame.TextLabel.Text = "Hope you enjoy the"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjoy the m"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjoy the me"
            wait(0.1)
            gui.Frame.TextLabel.Text = "Hope you enjoy the mea"
            wait(0.1)
           gui.Frame.TextLabel.Text = "Hope you enjoy the meal"
            wait(1)
           gui.Frame.Visible = false
end

script.Parent.MouseButton1Click:connect(buy)

I think the problem was the fact that you tried to change the gui IN the starter gui and not in the player gui.