Moving to a specific slot in an inventory, Custom item icon in container, spawning item in container

I'm trying to make a slot machine gambling box, where the item fall down from the top to do so i would need to
or am i better off just learning how to make a GUI (seams like a lot more work)
1.open container on chat command(I think something like player.inventory.loot.AddContainer would work right?)
2. Fill container with with items(idk how to use this player.inventory.loot.entitySource)
3.move items in container(Idk how to spawn items in a container, let alone move them, or do i need to delete it all and spawn new ones every time the slot part moves?)
4.Add buttons to allow interactions(I presume i should use notes with text in them so they are all each different to keep track of there position, something with this
void OnLootItem(BasePlayer player, Item item) ?)
4.(optinal) Add custom icons to the items to make it looks smother(skins for unused items? like christmas doors and stuff like that)

Thanks for any help

 

So I have discovered I can use container.inventory.GiveItem(ItemManager.CreateByItemID()) to spawn the items in side a container, I could have it delete items XYZ in side, than re spawn them, is this the only way to do such a thing? or is there another way? Thanks!

 

Skins ^^ Good plugin to look at for something like that

 

thank you, didn't think about that. Just realized that i should look at the backpack plugin and that would probably help with the entity spawning and such.