Transforming and playing particle effects? Help!

Updated: I changed some of the code around, and this is what it looks like now: This is the code I made to create and play the particle effect the particle effect:

 public class PlayScript : MonoBehaviour
 {
 
     public GameObject delete;
     public GameObject player;
     private Projectile bullet;
     private BulletDeleteSytem2 isDeleted;
     public Rigidbody shrapnel;
     public Transform BulletSpawn;
     
 
     void Start()
     {
         delete = GameObject.Find("Bullet");
         isDeleted = delete.GetComponent<BulletDeleteSytem2>();
         player = GameObject.Find("FirstPersonPlayer");
         bullet = player.GetComponent<Projectile>();
     }
 
     // Update is called once per frame
     void Update()
     {
         if (bullet.BullEx)
         {
             Rigidbody clone;
             clone = Instantiate(shrapnel, BulletSpawn.position, shrapnel.rotation);
             Debug.Log("HasCreated");
             bullet.BullEx = false;
             Debug.Log("Works");
         }
 
         if (isDeleted.BullColl)
         {
             gameObject.GetComponent<ParticleSystem>().Play();
             Debug.Log("HasPlayed");
 
         }
         transform.localPosition = BulletSpawn.position; 
     }
 }

And this is the script that changes the variables in "playscript1"

 public class BulletDeleteSytem2 : MonoBehaviour
 {
     Rigidbody rb;
    
     public bool BullColl = false;
     void Start()
     {
         rb = GetComponent<Rigidbody>();
     }
 
 
 
     void OnCollisionEnter(Collision collision)
     {
 
         
         BullColl = true;
         Debug.Log(BullColl);
         Destroy(gameObject);
 
     }
     
     
 }

I hope this makes it easier to understand, as before it was a huge mess. Thanks to rh_galaxy for the advice of cleaning this code up