Animated items

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:

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.

 

You answered your own question. Schedule a repeating task that changes the item. What else do you need to know?