yield return new WaitForSeconds

Scripting
1

Hi, i am learning C#, and i´m making a game with some friends.
I´m having problems with yield. What i´m trying to do is that when you touch a trigger, after 2 seconds the gameobject gets disabled. And I want the gameobject be enabled again after another 2 seconds.
I tried to write two yield return new Waitforseconds but the second one doesn´t seems to work, so I decided to create a bool and when that bool is true, in FixedUpdate function, there is a float, and finally, when that float gets X number the gameobjects ges enabled again.
There is my code:

using UnityEngine;
using System.Collections;

public class nube_real : MonoBehaviour
{

    public bool hideNR = false;

    public float tiempoOculta = 0;

    public ParticleSystem nubeR;

    IEnumerator OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "pj")
        {
            yield return new WaitForSeconds(2);
            gameObject.SetActive(false);
            nubeR.Play();
            hideNR = true;
        }
    }

    void FixedUpdate()
    {
        if (hideNR == true)
        {
            tiempoOculta ++;
        }
   
        if (tiempoOculta >=100)
        {
            Debug.Log("Hola");
            gameObject.SetActive(true);
            hideNR = false;
        }
    }
}

I also tried this, but like I said before, the second yield doesn´t seems to work.

  public bool hideNR = false;

    public ParticleSystem nubeR;

    IEnumerator OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "pj")
        {
            yield return new WaitForSeconds(2);
            gameObject.SetActive(false);
            nubeR.Play();

            yield return new WaitForSeconds(2);
            gameObject.SetActive(true);
        }
    }

Thank you and sorry for my English.

2

You set the GameObject to not active… why would it still run code?

3

OMG, I just realized… Thank you so much!!
This is what I have done:

using UnityEngine;
using System.Collections;

public class nube_real : MonoBehaviour
{
    public Renderer rend;

    public bool hideNR = false;

    public float tiempoOculta = 0;

    public ParticleSystem nubeR;

    IEnumerator OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "pj")
        {
            yield return new WaitForSeconds(2);
            rend.enabled = false;
            nubeR.Play();
            hideNR = true;
        }
    }

    void FixedUpdate()
    {
        if (hideNR == true)
        {
            tiempoOculta = tiempoOculta + 1;
        }
      
        if (tiempoOculta >=100)
        {
            rend.enabled = true;
            hideNR = false;
        }
    }
}