Hello, good afternoon, nights, day, or whatever in your country ... I am creating a complement of menus, and I need a way to create animated itemstacks, and that the materials of the itemstacks are in an ArrayList of a configuration file, what I don't know how to do is serialize the lists to be able to go through each one individually. I will give an example of what I am trying to say. Code (Text): Inventory: 1: Material: - 'DIAMOND' - 'GOLD' 2: Material: - 'COAL' - 'STONE' - 'REDSTONE' 3: Material: - 'EMERALD_BLOCK' Going through the materials I think I know how I could do it, just a BukkitTask. Well, I appreciate any help in advance.