How to add Particle

<?php
namespace particle;
use pocketmine\plugins\PluginBase;
use
use pocketmine\math\Vector3;
use pocketmine\level\Level;
use CD\FireworkParticle;
use pocketmine\level\particle\LavaParticle;
class Main extends PluginBase{
}

 

your code is the start of a plugin without onEnable(), without Listener, without an Event when you want to spawn the particle... Start learning how to code php for pmmp than come back

 

Start here

https://www.youtube.com/results?search_query=how+to+make+a+pocketmine+plugin

 

How to add a Particle

 

Maybe it helps to take a look at how the particle command works:
https://github.com/pmmp/PocketMine-...cketmine/command/defaults/ParticleCommand.php