Trying to make a timer work..

I've been fiddling around with this for about an hour now trying to make it work, the best I've been able to do is have it run, but then it resets the timer to 2 every update.

My goal has been to have the CountDown method start when the conditions are met, but not loop in the ball update method.

Ball Class:

 void Update () {
 
         //If superBallActive is true, start 2 second countdown
         if (superBallActive && counter.timerTrigger) {
             counter.CountDown(2f);
         }

Timer Class:

 using UnityEngine;
 using System.Collections;
 
 public class CounterClass : MonoBehaviour {
     public bool timerTrigger = true;
 
     private Ball ball;
 
     void Start() {
         ball = GameObject.FindObjectOfType<Ball>();
     }
 
     public void CountDown(float t) {
       //  timerTrigger = false;
      //   while (timerTrigger) { // Crashes unity
             Debug.LogError("CountDown Started");
             if (t > 0) {
                 t -= Time.deltaTime;
             } else if (t <= 0) {
                 CountDownEnded();
                 Debug.LogError("Count Down Ended.");
             }
             Debug.LogWarning("Time: " + t);
      //   }
     }
     void CountDownEnded() {
         ball.superBallActive = false;
         timerTrigger = true;
     }
 }