This intro script for my game is giving me a number value error?

game.Players.LocalPlayer.PlayerGui:SetTopbarTransparency(0)
local contentprovider = game:GetService("ContentProvider")
local thingstosay = {"Make sure to do your best!","Use correct grammar!","Don't mess around!","Remember, this is a 'Interview center' not a 'Training Center'."}

function changetxt()
    local tosay = thingstosay[math.random(1,#thingstosay)]
    local txt = script.Parent.bck.tip
    txt.Text = (tosay)
end


function fade()
    local s1 = script.Parent.bck
    local s2 = script.Parent.bck.tip
    local s3 = script.Parent.bck.ld
    s1.BackgroundTransparency = s1.BackgroundTransparency + 0.01
    s2.TextTransparency = s2.TextTransparency + 0.01
    s3.TextTransparency = s3.TextTransparenc``y + 0.01
end

local AmountOfAssetsLoaded = script.Parent.bck.AssetsLoaded.Value
local AllAssets = game.ContentProvider.RequestQueueSize
AssetsLoaded = game.ContentProvider.RequestQueueSize
AmountOfAssetsLoaded.Value = game.ContentProvider.RequestQueueSize

while game.ContentProvider.RequestQueueSize > 0 do
    if game.ContentProvider.RequestQueueSize < AssetsLoaded then
        AmountOfAssetsLoaded.Value = game.ContentProvider.RequestQueueSize
        AmountOfAssetsLoaded.Changed:connect(changetxt)
    end
end

repeat fade() until script.Parent.bck.BackgroundTransparency == 1

At line 24 it gives me this error Players.ThatGamer883.PlayerGui.Intro.lod:24: attempt to index local 'AmountOfAssetsLoaded' (a number value)

Any help would be appreciated, thanks!