How do I make this happen once?

I need help making this script happen once.

local Screen = script.Parent
local Config = Screen.Config
local Filter = Screen.Filter
local Content = Screen.Content

function FilterFade(start,finish,step)
	for i = start,finish,0.03/step do
		Filter.BackgroundTransparency = i
		wait()
	end
	Filter.BackgroundTransparency = finish
end

Filter.Visible = true
for _,image in pairs(Content:GetChildren()) do image.Visible = false end
wait(Config.Padding_Time.Value)
for _,image in pairs(Content:GetChildren()) do
	image.Visible = true
	FilterFade(0,1,Config.Fade_Time.Value)
	wait(Config.Display_Time.Value)
	FilterFade(1,0,-Config.Fade_Time.Value)
	image.Visible = false
	wait(Config.Display_Time.Value)
end
wait(Config.Padding_Time.Value)
Screen.Background.Visible = false
FilterFade(0,1,Config.Fade_Time.Value)

Screen:Remove()

-- DON'T MESS WITH THIS UNLESS YOU KNOW WHAT'S GOING ON.

 -- To chnage time, go to Config, and change the values in the stuff in there.

 -- In cotent is what you want to show up.

 -- Change background and filter to the background color. Keep it the same color.

also this script, I dont know wich one tho

script.Parent = nil

local legui = script.Intro:Clone()
game.Players.PlayerAdded:connect(function(player)
	player.CharacterAdded:wait(8.5)
wait(8.5)
	legui:Clone().Parent = player.PlayerGui
end)
--Created by iGoldenX