Question about roll a ball tutorial

I am a beginner with Unity and was doing the roll a ball tutorial. Now the winText shows up before i hit play, but after i do it just shows no writing where the text should be appearing, though if i zoo out on the scene and look at the canvas i see the box where the text should be. In the inspector, after i click play, the box to write my text becomes empty, then when i stop te simulation, it shows that it says "You Win! using UnityEngine; using UnityEngine.UI; using System.Collections;

public class PlayerController : MonoBehaviour {

 public float speed;
 public Text countText;

 private Rigidbody rb;
 private int count;
 public Text winText;

 void Start ()
 {
     rb = GetComponent<Rigidbody>();
     count = 0;
     countText.text = "Count: " + count.ToString();
     winText.text = "";
 }

 void FixedUpdate()
 {
     float moveHorizontal = Input.GetAxis("Horizontal");
     float moveVertical = Input.GetAxis("Vertical");

     Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

     rb.AddForce(movement * speed);
 }
 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.CompareTag("Pick Up"))
     {
         other.gameObject.SetActive(false);
         count = count + 1;
         countText.text = "Count: " + count.ToString();
     }
 }
 void SetCountText()
 {
     countText.text = "Count: " + count.ToString(); 
     if(count>=12)
     {
         winText.text = "You Win!";
     }
 }

}