Somewhere in main class onEnable(): $this->getServer()->getScheduler()->scheduleRepeatingTask(new CheckBlockTask($this), 5); PHP: namespace your\own\name\space;use pocketmine\block\Block;use pocketmine\scheduler\PluginTask;class CheckBlockTask extends PluginTask{ public function onRun($t){ foreach($this->getOwner()->getServer()->getOnlinePlayers() as $p){ if($p->getLevel()->getBlock($v3 = $p->floor()->subtract(0, 1))->getId() === 46){ $p->getLevel()->setBlock($v3, Block::get(0)); } } }}