on right click:
   event-block is ender chest
   cancel event
   open virtual chest inventory with size 6 named "Big Ender Chest" to player
   set {_slot} to 0
   loop {EnderChest%player%::*}:
      set slot {_slot} of player's current inventory to loop-value
      add 1 to {_slot}

on inventory close:
   inventory name of player's current inventory is "Big Ender Chest"
   clear {EnderChest%player%::*}
   set {_slot} to 0
   loop 54 times:
      add slot {_slot} of player's current inventory to {EnderChest%player%::*}
      add 1 to {_slot}