Adding timer to progress bar in Unity 5

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Adding timer to progress bar in Unity 5, C# script used in the tutorial above :

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

public class timerTwo : MonoBehaviour {
    Image fillImg;
    float timeAmt = 10;
    float time;
    public Text timeText;  

    // Use this for initialization
    void Start () {
        fillImg = this.GetComponent<Image>();
        time = timeAmt;
    }
    
    // Update is called once per frame
    void Update () {
        if(time  > 0){
            time -= Time.deltaTime;
            fillImg.fillAmount = time / timeAmt; 
            timeText.text = "Time : "+time.ToString("F");  
        }
    }
}

Make sure to add "using UnityEngine.UI" otherwise you won't able to use "Image", "Text" variables in your script.

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