How To Reset Timer on a Collision (C#)

Here is my timer script.

using UnityEngine; using System.Collections; using UnityEngine.UI;

public class TimeManager : MonoBehaviour {

 public float startingTime;

 private Text theText;

 public GameObject gameOverScreen;

 // Use this for initialization
 void Start () {
     
     theText = GetComponent<Text> ();

 }

 // Update is called once per frame
 void Update () {


     startingTime -= UnityEngine.Time.deltaTime;

     if (startingTime <= 0) {
         gameOverScreen.SetActive (true);

     }

     theText.text = "" + Mathf.Round (startingTime);


 }

}

Here is my coin script.

using UnityEngine; using System.Collections;

public class CoinPickup : MonoBehaviour {

 public int pointsToAdd;

 void OnTriggerEnter2D (Collider2D other)
 {
     if (other.GetComponent<PlayerControler> () == null)
         return;

     ScoreManager.AddPoints (pointsToAdd);

     
     Destroy (gameObject);
 }

}