public static final MaplePacket trembleEffect(final int type, final int delay) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();
        mplew.writeShort(SendPacketOpcode.BOSS_ENV);
        mplew.write(1);
        mplew.write(type);
        mplew.writeInt(delay);
        return mplew.getPacket();
    }