Callback.addCallback("DestroyBlock", function(c, block, player){
    if(block.id == 18 || block.id == 161){
        let id;
    if(block.id == 18){
                if([0, 4, 8].indexOf(block.data) != -1) id = ItemID.OakLeaf;
                else if(1, 5, 9].indexOf(block.data) != -1) id = ItemID.PineNeedle;
               else if([2, 6, 10].indexOf(block.data) != -1) id = ItemID.BirchLeaf;
              else if([3, 7, 11].indexOf(block.data) != -1) id = ItemID.TropicalTreeLeaf;
    }else{
               if([0, 4, 8].indexOf(block.data) != -1) id = ItemID.AcaciaLeaf;
            else if([1, 5, 9].indexOf(block.data) != -1) id = ItemID.AcaciaLeaf;
    }
        World.drop(c.x, c.y, c.z, id, java.util.Random(3), 0);
    }
});