on anvil prepare:
loop blocks in radius 3 of player's target block:
loop-block is any anvil
set loop-block to air
stop
on load:
register new shaped recipe for anvil using air, iron chestplate, air, air, iron chestplate and air with id "my_recipes:anvil"
mozliwe ze bedzie dzialac, dodalem tez custom crafting, ustaw se itemy