How to do it...

To display a text message that fades away, follow these steps:

1. In the Inspector panel, remove the scripted component, DigitalCountdown, from the Text-clock GameObject.
2. Create a C# script class, FadeAway, that contains the following code, and add an instance as a scripted component to the Text-hello GameObject:

using UnityEngine; 
using UnityEngine.UI; 

[RequireComponent (typeof (CountdownTimer))] 
public class FadeAway : MonoBehaviour { 
   private CountdownTimer countdownTimer; 
   private Text textUI; 

   void Awake () { 
         textUI = GetComponent<Text>();       
         countdownTimer = GetComponent<CountdownTimer>(); 
   } 

   void Start(){ 
         countdownTimer.ResetTimer( 5 ); 
   } 

   void Update () { 
         float alphaRemaining = 
         countdownTimer.GetProportionTimeRemaining(); 
         print (alphaRemaining); 
         Color c = textUI.color; 
         c.a = alphaRemaining; 
         textUI.color = c; 
   } 
} 

3. When you run the Scene, you will now see that the message on the screen slowly fades away, disappearing after five seconds.