Task instance error

I'm getting an error with schedule task.

Spoiler: Error

[22:32:50] [Server thread/NOTICE]: InvalidArgumentException: "Argument 1 passed to pocketmine\scheduler\ServerScheduler::scheduleRepeatingTask() must be an instance of pocketmine\scheduler\Task, instance of HG\Timer given, called in C:\Users\Jesus\Downloads\PocketMine-MP\plugins\HG\src\HG\Main.php on line 22 and defined" (E_RECOVERABLE_ERROR) in "/src/pocketmine/scheduler/ServerScheduler" at line 119

Ok it worked thanks , but how do I send logger or something to test if it works because I keep getting error message.

PHP:

    public function onRun($tick){

        $this->plug->secs--;

        if($this->plug->secs === 0){

            $this->getLogger()->info("it works!");

            $this->plug->secs = 5;

        }
    }


Spoiler: Error

Fatal error: Call to undefined method HG\Timer::getLogger() in C:\Users\Jesus\Downloads\PocketMine-MP\plugins\HG\src\HG\Timer.php on line 25

Use $this->plugin->getLogger()->info("it works!");

Finally something useful. xD

I just get irritated sometimes with all the dumb questions. XD