Loading Screen Doesn't Work In Game But Only Studio? HELP!

Yeah so my game I am currently working on has it's own loading screen (YES I DID GET RID OF THE DEFAULT LOADING SCREEN)But once i play it in the ROBLOX player.....It just doesn't play the loading screen?!?! Can someone help!

CODE:

local LBG = script.Parent.LoadingScreen
local LB = script.Parent.LoadingScreen.LoadBar
local LT = script.Parent.LoadingScreen.LOADING

LBG.Visible = true
wait(4)
	LT.Text = "Grab A Sandwhich while we load"
wait(1)
	LB.Size = UDim2.new(0,100, 0,20)
wait(2)
	LB.Size = UDim2.new(0,300, 0,20)
wait(1)
	LB.Size = UDim2.new(0,600, 0,20)
wait(4)
	LB.Size = UDim2.new(0,1200, 0,20)
		LT.Text = "ALMOST THERE"
wait(9)
	LB.Size = UDim2.new(0,1500, 0,20)
		LT.Text = "FINISHED! Give us a second please..."
wait(3)
	LBG.Visible = false

Use in a Local Script in your GUI You Have No trigger for your script so its doesnt know when to do it you need a

While wait(1) do

Also at the End of the script it will stop the script from function once finished by disabling it

Also i added in some WaitForChild as it will help the script

local LBG = script.Parent:WaitForChild("LoadingScreen")
	local LB = script.Parent.LoadingScreen:WaitForChild("LoadBar") 
--The WaitForChild will Make it wait for the loading screen
	local LT = script.Parent.LoadingScreen:WaitForChild("LOADING")
	 
        while wait(1) do --Trigger
	LBG.Visible = true
	wait(4)
	    LT.Text = "Grab A Sandwhich while we load"
	wait(1)
	    LB.Size = UDim2.new(0,100, 0,20)
	wait(2)
	    LB.Size = UDim2.new(0,300, 0,20)
	wait(1)
	    LB.Size = UDim2.new(0,600, 0,20)
	wait(4)
	    LB.Size = UDim2.new(0,1200, 0,20)
	        LT.Text = "ALMOST THERE"
	wait(9)
	    LB.Size = UDim2.new(0,1500, 0,20)
	        LT.Text = "FINISHED! Give us a second please..."
	wait(3)
	    LBG.Visible = false
        wait(2)
        script.Disabled = true --Stops Script For Player
       end