How to fix it?

How to fix it to the pickaxes destroyed?

<?php

namespace stonegen;

use pocketmine\plugin\PluginBase as PluginBase;
use pocketmine\event\Listener as Listener;
use pocketmine\utils\TextFormat;
use pocketmine\event\block\BlockBreakEvent;
use pocketmine\event\block\BlockPlaceEvent;
use pocketmine\utils\Config;
use pocketmine\block\Block;
use pocketmine\block\Air;
use pocketmine\block\Stone;
use pocketmine\math\Vector3;
use pocketmine\item\Item;
use pocketmine\level\particle\LavaParticle;
use pocketmine\level\sound\BlazeShootSound;


class Main extends PluginBase implements Listener{


public function onEnable(){
$this->getServer()->getPluginManager()->registerEvents($this,$this);
$this->saveDefaultConfig();
$this->getServer()->getLogger()->info(TextFormat::GREEN . "Loading");
}

public function onPlace(BlockPlaceEvent $event){
$blok = $event->getBlock();
$gracz = $event->getPlayer();
$y = $blok->getFloorY();
$x = $blok->getFloorX();
$z = $blok->getFloorZ();

if($blok->getId() == 121){
if(!($event->isCancelled())){
$gracz->getLevel()->setBlock(new Vector3($blok->getFloorX(), $blok->getFloorY()+1, $blok->getFloorZ()), new Stone());
$gracz->sendMessage("• Postawiles stoniarke! •");
$center = new Vector3($x, $y, $z);
$particle = new LavaParticle($center);
for($yaw = 0, $y = $center->y; $y < $center->y + 3; $yaw += (M_PI * 2) / 20, $y += 1 / 20) {
$x = -sin($yaw) + $center->x;
$z = cos($yaw) + $center->z;
$particle->setComponents($x, $y, $z);
}
}else{
$gracz->sendMessage("• Nie możesz postawić tutaj stoniarki, ten teren jest zabezpieczony •");
}
}
}

public function onBreak(BlockBreakEvent $event){
$blok = $event->getBlock();
$gracz = $event->getPlayer();
$y = $blok->getFloorY();
$x = $blok->getFloorX();
$z = $blok->getFloorZ();
if($blok->getId() == 1){
if($gracz->getLevel()->getBlock(new Vector3($x, $y-1, $z))->getId() == 121) {
$event->setCancelled();
if($this->getConfig()->get("rzeczy-do-eq") == "tak"){
$gracz->getInventory()->addItem(Item::get($this->getConfig()->get("item"), 0, $this->getConfig()->get("ilosc")));
}elseif($this->getConfig()->get("rzeczy-do-eq") == "nie"){
$gracz->getLevel()->dropItem(new Vector3($x, $y, $z), Item::get($this->getConfig()->get("item"), 0, $this->getConfig()->get("ilosc")));
}
}
}elseif($blok->getId() == 121){
$gracz->getLevel()->setBlock(new Vector3($blok->getFloorX(), $blok->getFloorY()+1, $blok->getFloorZ()), new Air());
$gracz->sendMessage(TextFormat::YELLOW . "• Stoniarka usunięta •");
$center = new Vector3($x, $y, $z);
$particle = new LavaParticle($center);
for($yaw = 0, $y = $center->y; $y < $center->y + 5; $yaw += (M_PI * 4) / 20, $y += 3 / 20) {
$x = -sin($yaw) + $center->x;
$z = cos($yaw) + $center->z;
$particle->setComponents($x, $y, $z);
}
}
}
}

What?

Better than Google translate: http://www.bing.com/translator

What do you mean?

Please use the code insertion tool to make it easier on everyone. Do you want the entire pickaxe broken, or do you just want a certain amount of damage done to it?