public function onBreak(BlockBreakEvent $event)
{
if ($event->getBlock()->getId() == 15) {
$drops = array(Item::get(265, 0, 1));
$event->setDrops($drops);
}
if ($event->getBlock()->getId() == 14) {
$drops = array(Item::get(266, 0, 1));
$event->setDrops($drops);
}
}