How do you use a sleep function without freezing your screen?

I am trying to make a cutscene in w$$anonymous$$ch the player passes a certain point, and then it disables the main camera and player controller, then activates the cutscene camera and plays an animation. I want it to finsh the animation, and then re-activate the main camera and player controller.

     public GameObject cam1 = null;
     public GameObject cam2 = null;
     public GameObject Player = null;
     public GameObject Ammo = null;
     public GameObject Cube = null;
 
     void Start () 
     {
 
     }
     
     void Update () 
     {
         
     }
     
     void OnTriggerEnter(Collider bro)
     {
         if(bro.tag == "Player")
         {
             bro.GetComponent<Player>().checkPos = transform.position;
             cam1.SetActive(false);
             cam2.SetActive(true);
             Ammo.SetActive(false);
             Cube.SetActive(false);
             Player.GetComponent<PlayerController>().enabled = false;
             System.Threading.Thread.Sleep(5000);
             cam1.SetActive(true);
             cam2.SetActive (false);
             Ammo.SetActive(true);
             Cube.SetActive(true);
             Player.GetComponent<PlayerController>().enabled = true;
         }
     }
 }