How to wait a few seconds within an If then statement?

I've got a game where after you hit a collider 5 times with a projectile, it turns into a black hole. I need to know how to turn off the black hole after 5 seconds. It turns off by resetting the score back to 5.
How do I do this?


if (GameManager.BlackHoleScore <= 0)
{ renderer.material.color = Color.black;
Physics.gravity = new Vector3 (0f, -9.81f, 0f);
Destroy (col.gameObject);

//WAIT 5 SECONDS

GameManager.BlackHoleScore = 5; }

 

I think something like this

Code (csharp):

1. IEnumerator Blackhole ()
2.     {
3.             yield return new WaitForSeconds(5.0f); // waits before continuing in seconds
4.             // code to do after the wait
5.     }
6.  

and you call that with (put this in the if statement)

Code (csharp):

1. StartCoroutine(Blackhole());

 

So it should be something like this? It doesn't wait, it just resets immediately. What am I doing wrong?

using UnityEngine;
using System.Collections;

public class GravityShift : MonoBehaviour {

public static Vector3 BlackHolePosition;
public static Quaternion BlackHoleRotation;

void Update () {

}

IEnumerator Blackhole ()

{

yield return new WaitForSeconds(5.0f); // waits before continuing in seconds

// code to do after the wait

}

void OnCollisionEnter (Collision col)
{
if ((GameManager.MyGrav == 1 || GameManager.MyGrav == 0 ) GameManager.BlackHoleScore >= 1 col.gameObject.tag == "Player1Ball") {
Physics.gravity = new Vector3 (0f, -9.81f, 10f);
GameManager.MyGrav = 2;
renderer.material.color = Color.blue;
GameManager.Player1Balls += 5;
GameManager.BlackHoleScore -= 1;
}

if ((GameManager.MyGrav == 2 || GameManager.MyGrav == 0 ) GameManager.BlackHoleScore >= 1 col.gameObject.tag == "Player2Ball")
{ Physics.gravity = new Vector3 (0f, -9.81f, -10f);
renderer.material.color = Color.red;
GameManager.MyGrav = 1;
GameManager.Player2Balls += 5;
GameManager.BlackHoleScore -= 1;
}

if (GameManager.BlackHoleScore <= 0)
{ renderer.material.color = Color.black;
Physics.gravity = new Vector3 (0f, -9.81f, 0f);
Destroy (col.gameObject);
StartCoroutine(Blackhole());
GameManager.BlackHoleScore = 5;
renderer.material.color = Color.white;}
}
}

 

Good answer! Minor edit for clarity: