How do I control objects created by a class

Hello, I have a beginner question!

I am designing my own particle system in Unity. So far I have a particle class which defines the particles location, size and age. I also have an emitter class which has a data structure for the particles.

I do not understand how to control game objects that are not already attached to a game object. For example my particle class is defined as:

public class Particle : MonoBehaviour {
	
	public int position,
				velocity,
				age,
				maxAge;
	GameObject appearance = GameObject.CreatePrimitive(PrimitiveType.Sphere);

and my emitter class is defined as:

public class Emitter : MonoBehaviour {

	//setup data structure to hold particles
	Particle[] p_system = new Particle [500];
	
	// Use this for initialization
	void Start () {
	
		//initialize all of the particles
		for(int i = 0;i < p_system.Length;++i)
  			p_system *= new Particle();*
  • }*
    On Play, I’m able to spawn 500 spheres, but I do not know how to edit their transforms.

p_system*.appearance.transform*