The script is a LocalScript (obviously), and it is placed in StartedPack. There are a few output logs, and here they are:

18:17:46.318 - LoadAnimation requires the Humanoid object (Player1.Humanoid) to be a descendant of the game object

18:17:46.319 - Stack Begin

18:17:46.319 - Script 'Players.Player1.Backpack.LocalScript', Line 4

18:17:46.320 - Stack End

I have no idea of what this means. Here's the script:

local humanoid = game.Players.LocalPlayer.Character.Humanoid
local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?ID=563297335"
local animTrack = humanoid:LoadAnimation(animation)
while true do
	wait(5)
	animTrack:Play()
end
Anonymous