Animation wont Run?

1. What is onEnter?
2. FindFirstChild is a function, not a property
3. You can't just say StarterPack.
4. You need to load the animation in the humanoid
5. Functions need "()"s at the end.

I'm guessing onEnter means when the player enters. So we use PlayerAdded.

game.Players.PlayerAdded:connect(function(player)
    print(player.Name) --Prints the player's name.
end)

FindFirstChild is a function,

game.StarterPack:FindFirstChild()

You cannot say StarterPack by itself as if it's script or game.

game.StarterPack

game:GetService("StarterPack")

You need to load the animation first.

workspace.Player1.Humanoid:LoadAnimation(animation)

Functions like "play" need "()"s at the end.

animation:play()

Now we add this all together

game.Players.PlayerAdded:connect(function(player)
    player.CharacterAdded:connect(function(character)
        local script = game.StarterPack.LocalScript
        if character:FindFirstChild("Humanoid") then
            local animation = Instance.new("Animation")
            animation.AnimationId = "http://www.roblox.com/Asset?ID=222080965"
            local animtrack = character.Humanoid:LoadAnimation(animation)
            animtrack:play()
        end
    end)
end)

Hope this helps!