Solved removing a block after 30 seconds

i'm having issues with my code and it's the block isn't breaking after 30 seconds

PHP:

class EVEvents implements Listener {

    public function __construct(Main $plugin) {
        $this->plugin = $plugin;
        $this->time = 30;
    }

    public function onBlockPlace(BlockPlaceEvent $event) {
        $Player = $event->getPlayer();
        $ev = $event->getBlock()->getId();
        $block = $event->getBlock();
        $x = $block->getX();
        $y = $block->getY();
        $z = $block->getZ();

        $evdamage = $event->getBlock()->getDamage();
        if ($ev === 120 || $evdamage === 1) {
            $Player->addTitle("§8§l[§5!§8]§r§e Opening an Ender Vault §8§l[§5!§8]", "§8§l[§5!§8]§r§7 The ender vault will automatically break after 30 seconds! §8§l[§5!§8]§r");
            $block->getLevel()->addParticle(new FloatingTextParticle(new Vector3($x + 0.5, $y + 2.5, $z + 0.5), "", "§8§l[§5!§8] §r§d Rewards §l§8[§5!§8]§r"));
        }

        $timer = $this->time--;
        if ($timer == 30) {
            $ev = $event->getBlock()->getId();
            $block = $event->getBlock();
            if ($ev === 120 || $evdamage === 1) {
                $x = $block->getX();
                $y = $block->getY();
                $z = $block->getZ();
                $pos = new Vector3($x, $y, $z);
                $replacement = Item::AIR;
                $level = $Player->getLevel();
                $level->setBlock($pos, $replacement, true);
                $block->getLevel()->addParticle(new FloatingTextParticle(new Vector3($x + 0.5, $y + 2.5, $z + 0.5), "", ""));
            }
        }
    }
}

 

Best Create the Task in Separate Classes and Place the BlockPlaceEvent Function on Proper Main and When Activated Call the Task That in Time Removes the Block

in Main.php:
public function blockPlace(BlockPlaceEvent $ev){
$b = $ev->getBlock();
if($b->getId() == 120 and $b->getDamage() == 1){
$this->getServer()->getScheduler()->scheduleRepeatingTask(new remove($this, $b), 20); //define name to task *remove.php*
return true;
}
}
inTask :
public function __construct(Main $pl, $b){
$this->pl = $pl;
$this->b = $b;
}
public $time = 30;
public function onRun($tick){
$this->time--;
if($this->time == 0){
$b = $this->b;
$b->getLevel()->setBlock($b, Block::get(block::AIR));
$this->getServer()->cancelTask($this->getTaskId());
}
}

 

still doesn't remove the block

 

welp, i guess i have to find another way