public class Main extends JavaPlugin implements Listener{

    private ProtocolManager protocolManager;
    private int entId = 6000;
    private Map<String, Integer> spawned = new HashMap<String, Integer>();

    @Override
    public void onLoad(){
        protocolManager = ProtocolLibrary.getProtocolManager();
    }

    @Override
    public void onEnable(){
        Bukkit.getPluginManager().registerEvents(this, this);
        protocolManager.addPacketListener(new PacketAdapter(this, ListenerPriority.NORMAL, PacketType.Play.Client.USE_ENTITY){
            public void onPacketReceiving(PacketEvent e){
                if(!e.getPacketType().equals(PacketType.Play.Client.USE_ENTITY)) return;
                WrapperPlayClientUseEntity packet = new WrapperPlayClientUseEntity(e.getPacket());
                if(!packet.getMouse().equals(EntityUseAction.INTERACT)) return;
                if(e.getPlayer().getItemInHand() == null || !e.getPlayer().getItemInHand().getType().equals(Material.REDSTONE)) return;
                if(!spawned.containsKey(e.getPlayer().getName())) return;
                WrapperPlayServerEntityDestroy dest = new WrapperPlayServerEntityDestroy();
                dest.setEntities(new int[]{ spawned.get(e.getPlayer().getName()) });
                dest.sendPacket(e.getPlayer());
            }
        });
    }

    @EventHandler
    public void onJoin(final PlayerJoinEvent e){
        new BukkitRunnable(){
            public void run(){
                WrapperPlayServerSpawnEntity packet = new WrapperPlayServerSpawnEntity();
                WrappedDataWatcher data = new WrappedDataWatcher();
                int id = entId++;
                spawned.put(e.getPlayer().getName(), id);
                packet.setEntityID(id);
                packet.setX(e.getPlayer().getLocation().getX());
                packet.setY(e.getPlayer().getLocation().getY());
                packet.setZ(e.getPlayer().getLocation().getZ());
                packet.setType(50);
                //data.setObject(1, (short) 1);
                data.setObject(2, "§dSwinka");
                data.setObject(3, (byte) 1);
                data.setObject(6, (float) 10);
                packet.sendPacket(e.getPlayer());
                WrapperPlayServerEntityMetadata packet2 = new WrapperPlayServerEntityMetadata();
                packet2.setEntityId(id);
                packet2.setEntityMetadata(data.getWatchableObjects());
                packet2.sendPacket(e.getPlayer());
                e.getPlayer().sendMessage("§6§lSpojrz w gore ^^");
            }
        }.runTaskLater(this, 40);
    }
}