Display timer to Roll a Ball Tutorial

I added the timer to Roll a Ball tutorial that calculates how much time the player took to finish the game. Here is the code :

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

 public class PlayerController : MonoBehaviour {
     public float speed;
     public float force;
     public Text countText;
     public Text winText;
     float myTime = 0f;
     int timertext = myTime as int;
     private Rigidbody rb;
     private int count;
 
     void Start ()
     {
         rb = GetComponent<Rigidbody> ();
         count = 0;
         SetCountText ();
         winText.text = "";
     }
 
     void Update ()
     {
         myTime += Time.deltaTime;
         if (count < 12) {
             myTime += Time.deltaTime; 
         }
     }
 
     void FixedUpdate ()
     {
 
         if (SystemInfo.deviceType == DeviceType.Desktop) {
             float moveHorizontal = Input.GetAxis ("Horizontal");
             float moveVertical = Input.GetAxis ("Vertical");
 
             Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
 
             rb.AddForce (movement * speed);
         }
             else
             {
             Vector3 movement = new Vector3 (Input.acceleration.x, 0.0f, Input.acceleration.y);
             // Adding force to rigidbody
             GetComponent<Rigidbody>().AddForce(movement * speed);   
         }
 
     }
         void OnTriggerEnter(Collider other)
         {
             if (other.gameObject.CompareTag ("Pick Up")) {
             other.gameObject.SetActive (false);
             count = count + 1;
             SetCountText ();
         }
 
     }
     void SetCountText ()
     {
         countText.text = "Score : " + count.ToString ();
         if (count >= 12) {
             winText.text = " You WIN !!!";
         }
     }
 }

how can i display "myTime" to text ui gameobject ? I am a noob, so please help. :)