if (haveItem(playerinv, new ItemStack(Material.ENDER_PEARL , 16 )){
	if (haveItem(playerinv, new ItemStack(Material.DIAMOND_BLOCK , 64 )){
		removeItem(player, new ItemStack(Material.ENDER_PEARL, 16));
		removeItem(player, new ItemStack(Material.DIAMOND_BLOCK, 32));
	}else{
		 event.setCancelled(true);
                    player.sendMessage("&7 Potrzebujesz 64 diax bloki");
		}
}else{
	 event.setCancelled(true);
                    player.sendMessage("&7 Potrzebujesz 16 ender pereł");
}