Tweening animations wont play?

I've checked the developer log, no errors relating to this script. The tweening just doesn't play. . Anyway, I have this system to tween 2 things at once, Coroutines just didn't time correctly. so I did this in the main script:

local Int = Instance.new("IntValue")
	Int.Parent = screen
	Int.Name = "TweenTrigger"
	Int.Value = 0
	local Left, Right = game.ReplicatedStorage.Left, game.ReplicatedStorage.Right
	Left:Clone().Parent = screen
	Right:Clone().Parent = screen
	while wait() do
		if Int.Value == 2 then
			Int.Value = Int.Value + 1

In two seperate scripts named Left and Right, for the tweening, I have this code:

while wait() do
	if script.Parent.Name == "LoadGui" then break end
end
local Int = script.Parent:WaitForChild("TweenTrigger").Value
local Right = script.Parent.Right
Int = Int + 1
if Int == 3 then
	Right:TweenPosition(UDim2.new(1.5, 0, 0, 0), "In", "Sine", 5, false, nil)
	Right:Destroy()
	script:Destroy()
end

Any ideas as to why this wouldn't work are appreciated

Ok here's my new code that should work but no? The animation doesn't play nor does the script continue with the deletion of the frame and script. I'm guessing its something in the second script. Yes, these are both local scripts. If it helps, its FE aswell. I've added prints around the script, and none print. So it must be the first loop in it.

	local Int = Instance.new("IntValue")
    Int.Parent = screen
    Int.Name = "TweenTrigger"
    Int.Value = 0
    local Left, Right = game.ReplicatedStorage.Left, game.ReplicatedStorage.Right
    Left:Clone().Parent = screen
    Right:Clone().Parent = screen
    while wait() do
        if Int.Value == 2 then
            Int.Value = Int.Value + 1
			
		end
	end	
end

while wait() do
    if script.Parent.Name == "LoadGui" then break end
end
local Int = script.Parent:WaitForChild("TweenTrigger")
local IntV = Int.Value
local Right = script.Parent.Right
IntV = IntV + 1

Int.Changed:connect(function(Num)
	if Num == 3 then
	    Right:TweenPosition(UDim2.new(1, 0, 0, 0), "In", "Sine", 5, false, nil)
	    Right:Destroy()
	    script:Destroy()
	end
end)