Making a music script use a table???

local Sound = script.Sound
local ContendProvider = game:GetService("ContentProvider")

local MaxSound = 2

local CurrSound = 0

local Music = {
    551334045,
    1524396093,
    627848963,

}




while true do
    if CurrSound <= MaxSound then
        Sound.SoundId = "rbxassetid://"..Music[CurrSound]
        CurrSound = CurrSound + 1
        Sound:Play()
        Sound.Ended:Wait()
    else
        CurrSound = 0
    end
end

i tried making this music script and im new to tables can someone explain to me what i did wrong

Output error / Players.ExternalSight.PlayerGui.MusicScript:20: attempt to concatenate string with nil