UI Loading Screen not working. Why?

Hey there, I was working with making a UI loading screen when the text should move, but when I did it, the text was not moving. Here is all the code:

local LoadingGui = script.Parent.Parent.Parent:WaitForChild("LoadingGui")
local LoadingFrame = script.Parent.Parent:WaitForChild("LoadingFrame")
local LoadingText = script.Parent:WaitForChild("LoadingText")

while true do
    LoadingText.Text = "Loading."
    wait(1)
    LoadingText.Text = "Loading.."
    wait(1)
    LoadingText.Text = "Loading..."
    wait(1)
    LoadingText.Text = "Loading"
end

wait(10)

LoadingGui:Destroy

I don't know why it did not work, but help would be highly appreciated.

Thank you!