[FIXED] Random Music script will not work Sound will not play?

So, I am trying to make a random music script and after a few tweaks it seems to randomize, however it is not playing afterwards and I could not think of why this is happening and i'm very confused. Help would be greatly appreciated <3 also it is a Script not a local script

while true do
    wait()
    if game.Workspace.mus1.IsPlaying == true then

    else
        ID = math.random(1,3)
        if ID == 1 then 
            game.Workspace.MusicID.Value = 303226835
            end

        if ID == 2 then
            game.Workspace.MusicID.Value = 504618717
        end


        if ID == 3 then
            game.Workspace.MusicID.Value = 411822352


        end 
        workspace.mus1.SoundId = workspace.MusicID.Value
        wait(1)
        script.Parent:Play()
    end 
    end