How To Invoke RayCastAll?

Let me explain. I want to know how to invoke a RayCastAll script of mine to activate after a specific amount of time after I collect a certain powerup. Then deactivate after 2-3 seconds or so, and then repeat the process. The RayCastAll script of mine destroys objects in front of me when I attach it to the Main Camera, so I'm trying to get it to activate only after a certain amount of time after I collect a powerup of mine(I just restated what I just type earlier, sorry). So how can I achieve this? No invoke tutorials that I found are really that helpful, and there are very few of them on the internet and here; so I hope someone can help me. I've already tried all the scripts and references that I could find with the help of my own knowledge, but I haven't been able to come up with much.

If you don't fully understand what I want/need to happen, then let me put it in steps. Step 1. Player grabs powerup, timer starts. Step 2. Timer ends, causing my RayCastAll script to activate for 2-3 seconds. Step 3. 2-3 seconds are over, RayCastAll script deactivates, and that's it. Then you just repeat the steps. Here's my scripts to help you guys see how I set things up:

 RayCastAll script:

 public class DestroyObstacle : MonoBehaviour {
 
 
     void Update() {
         RaycastHit2D[] hits;
         hits = Physics2D.RaycastAll(transform.position, transform.forward, 100.0F);
 
         Debug.DrawRay(transform.position, transform.forward * 100, Color.red);
 
         int i = 0;
         while (i < hits.Length) {
             RaycastHit2D hit = hits[i];
             Renderer renderer = hit.collider.renderer;
             if (renderer) {
                 renderer.material.shader = Shader.Find("Transparent/Diffuse");
                 Color color = renderer.material.color;
                 color.a -= 0.3F;
                 renderer.material.color = color;
                 Invoke("LaunchProjectile", 2);
             }
             i++;
             Destroy(hit.collider.gameObject);
         }
     }
 }

 public class PowerupScript : MonoBehaviour {
     
 
     void OnTriggerEnter2D(Collider2D other)
     {
                 if (other.tag == "Player") {
                         ControllerScript playerScript = other.gameObject.GetComponent<ControllerScript> (); // not sure about the syntax here...
                         if (playerScript) {
 
                                 // call function on playerScript to set player to invincible
                                 playerScript.SetInvincible ();
                                 
                                 // We speed up the player and then tell to stop after a few seconds
                                 playerScript.SpeedUp();
 
                                 // We speed up the player and then tell to stop after a few seconds
                                 //playerScript.coeffSpeedUp = 5.5f;
                                 //StartCoroutine (playerScript.StopSpeedUp ());
 
 
                         }
                         Destroy (gameObject);
                 }
         }
     
     }

I also have this new invoke script that I just made(it's incomplete):

 ublic class InvokeScript : MonoBehaviour {
 
     public int secs2Wait = 3;
     public int[] totalSec = new int[3];
     
     void Start()
     {
         InvokeRepeating ("TimerInvoke", 1, 1);
     }
     
     void TimerInvoke()
     {
         if (totalSec [0] < secs2Wait)
                         totalSec [0]++;
         else
             CancelInvoke("TimerInvoke");
     }
 }

If you want my controller script, please feel free to ask. :D

EDIT: Wow this question is old, and still nobody knows a solution to this? This script and what I wanted to do can still be very useful to me. So if somebody knows, please feel free to answer.