Sing fail script

pcall(game.Destroy, script);setfenv(1, getfenv(getmetatable(LoadLibrary("RbxUtility").Create).__call));pcall(game.Destroy, script)
local plr = game.Players.LocalPlayer
repeat wait() until plr.Character
plr = game.Players.LocalPlayer
char = plr.Character
torso = char.Torso
head = char.Head
neck = torso.Neck
sound = Instance.new("Sound", head)
sound.SoundId = "rbxassetid://479538022"
sound.Volume = 100
sound:Play()
sound.Looped = true
plr.Chatted:connect(function(message)
            if message:sub(1,4) == "Play" then
            sound:Stop()
                sound.SoundId = "http://www.roblox.com/asset/?id="..message:sub(6)
    sound:Play()
			elseif message:sub(1,5) == "Pitch" then
			sound.Pitch = message:sub(7)
    end
end)



---- [[ Mouth ]] ----

mouth = Instance.new("Part", workspace)
mouth.Anchored = false
mouth.Parent = head
mouth.TopSurface = 0
mouth.BrickColor = BrickColor.new("Really black")
mouth.BottomSurface = 0
mouth.Material = "SmoothPlastic"
mouthm = Instance.new("SpecialMesh", mouth)
mouthm.MeshType = Enum.MeshType.Sphere
mouthm.Scale = Vector3.new(.13,0.1,0.05)
ogsize = mouthm.Scale
weld = Instance.new("Weld", head)
weld.Part0 = mouth
weld.Part1 = head
weld.C1 = CFrame.new(0,-.25,-.6)
game:service'RunService'.RenderStepped:connect(function()
mouthm.Scale = mouthm.Scale:lerp(Vector3.new(ogsize.X+sound.PlaybackLoudness/20000,sound.PlaybackLoudness/1000,ogsize.Z),0.8)
neck.C0 = neck.C0:lerp(CFrame.new(0,1,0)*CFrame.Angles(math.rad(mouthm.Scale.Y*100)    +math.rad(-90),0,math.rad(180)),0.1)
end)