can't get a yield to work with an if

i'm trying to get this to work,
it's an example i copied from somewhere here, but once i put it in an 'if' it fails to start :


#what i got, copied the text and it works fine :

// Use this for initialization
void Start() {
Mylight = GetComponent<Light> ();
print ("Starting " + Time.time);
StartCoroutine (WaitS (bla));
print ("Before WaitAndPrint Finishes " + Time.time);

}

IEnumerator WaitS(float waitTime) {
yield return new WaitForSeconds(waitTime);
print("WaitAndPrint " + Time.time);
}

# i want it to work with a key press so i put it inside an if :

// Use this for initialization
void Start() {
Mylight = GetComponent<Light> ();
if(Input.GetKey(KeyCode.L))
{
print ("Starting " + Time.time);
StartCoroutine (WaitS (bla));
print ("Before WaitAndPrint Finishes " + Time.time);
}
}

IEnumerator WaitS(float waitTime) {
yield return new WaitForSeconds(waitTime);
print("WaitAndPrint " + Time.time);
}


#why is this not working?!?!

 

Start()
http://docs.unity3d.com/ScriptReference/MonoBehaviour.Start.html

Update()
http://docs.unity3d.com/ScriptReference/MonoBehaviour.Update.html

 

http://forum.unity3d.com/threads/using-code-tags-properly.143875/

Make your code readeble please so we can help you.

 

First, lets wrap that in some code tags:

Code (csharp):

1.  
2. // Use this for initialization
3. void Start() {
4.     Mylight = GetComponent<Light> ();
5.     print ("Starting " + Time.time);
6.     StartCoroutine (WaitS (bla));
7.     print ("Before WaitAndPrint Finishes " + Time.time);
8. }
9.  
10. IEnumerator WaitS(float waitTime) {
11.     yield return new WaitForSeconds(waitTime);
12.     print("WaitAndPrint " + Time.time);
13. }
14.  

Code (csharp):

1.  
2. // Use this for initialization
3. void Start() {
4.     Mylight = GetComponent<Light> ();
5.     if(Input.GetKey(KeyCode.L))
6.     {
7.         print ("Starting " + Time.time);
8.         StartCoroutine (WaitS (bla));
9.         print ("Before WaitAndPrint Finishes " + Time.time);
10.     }
11. }
12.  
13. IEnumerator WaitS(float waitTime) {
14.     yield return new WaitForSeconds(waitTime);
15.     print("WaitAndPrint " + Time.time);
16. }
17.  

Next, your problem is you test for if the L key is down ONLY on Start. This is once, only once, and is at the beginning of the life of the script.

You need to be testing for that key every frame and react accordingly.

 

Put your code in the update statement...
And maybe keyup...