Change block every second?

Is it possible to change the block type at X:125 Y:56 Z:63 every 1 second? Maybe One second ago it was white wool, now it maybe black wool. It may look like it is flashing.

PHP:

<?php
namespace your\own\name\space;
use pocketmine\plugin\PluginTask;
class ChangeBlockTask extends PluginTask{
  private $pos;
  private $list;
  private $current = 0;
  public function __construct(Main $main, Position $pos, array $list){
    parent::__construct($main);
    $this->pos = $pos;
    $this->list = $list;
    if(count($list) === 0){
      throw new \InvalidArgumentException;
    }
  }
  public function onRun($t){
    $this->pos->getLevel()->setBlock($this->pos, $this->list[$this->next()]);
  }
  private function next(){
    $this->current++;
    if($this->current >= count($this->list)) $this->current = 0; // loop back to the initial item
    return $this->current;
  }
}


PHP:

<?php
namespace your\own\name\space;
use pocketmine\block\Block;
use pocketmine\plugin\PluginBase;
class Main extends PluginBase{
  public function onEnable(){
    $this->getServer()->getScheduler()->scheduleDelayedRepeatingTask(new ChangeBlockTask($this, new Position(125, 56, 63, $this->getServer()->getDefaultLevel()), [Block::get(Block::WOOL, 0), Block::get(Block::WOOL, 15)]), 20, 20);
  }
}

wouldnt it lag?

2 different files?

I think so.

Isn't it best to put merge all schedulers?

ClassNotFoundException: "Class pocketmine\task\PluginTask not found" (EXCEPTION) in "/src/spl/BaseClassLoader" at line 144

Use the edited content.

yep

why?

change pocketmine\task\PluginTask to pocketmine\scheduler\PluginTask

So, like this?
blockchanger\src\legoboy\blockchanger\main.php
and
blockchanger\src\legoboy\blockchanger\task.php

for example, if you setBlock per tick, the Server lags IF you do that more than 100+. well im just assuming in my experience with WEA.

No!
only the imports/use. please compare analytically.

its still wrong xD it must be scheduler not plugin

So what should I name it?

He just asked to change one block.

Same as the class name of that file.
ChangeBlockTask.php
Main.php

Of course, change the namespace first.

PHP:

<?php
namespace robozeri\ChangeBlock;
use pocketmine\scheduler\PluginTask;
class ChangeBlockTask extends PluginTask{
  private $pos;
  private $list;
  private $current = 0;
  public function __construct(Main $main, Position $pos, array $list){
    parent::__construct($main);
    $this->pos = $pos;
    $this->list = $list;
    if(count($list) === 0){
      throw new \InvalidArgumentException;
    }
  }
  public function onRun($t){
    $this->pos->getLevel()->setBlock($this->pos, $this->list[$this->next()]);
  }
  private function next(){
    $this->current++;
    if($this->current >= count($this->list)) $this->current = 0; //
    return $this->current;
  }
}


PHP:

<?php
namespace robozeri\ChangeBlock;
use pocketmine\block\Block;
use pocketmine\plugin\PluginBase;
use robozeri\ChangeBlock\ChangeBlockTask;
class Main extends PluginBase{
  public function onEnable(){
    $this->getServer()->getScheduler()->scheduleDelayedRepeatingTask(new ChangeBlockTask($this, new Position(129, 4, 141, $this->getServer()->getDefaultLevel()), [Block::get(Block::WOOL, 0), Block::get(Block::WOOL, 15)]));
  }
}



Sorry because I know from error it does not work?

Thanks! Everyone!
A little question...
Will it being multiple blocks hard?

Use my edited content. I changed the Main class a bit, and also the first few lines of the ChangePluginTask class.

Simple solution: Please, LEARN BASICS of PHP.

PSR-4 isn't basics of PHP.

Code:

[CRITICAL] ClassNotFoundException: "Class legoboy\blockchanger\main not found" (EXCEPTION) in "/src/spl/BaseClassLoader" at line 111

What?!