change variable in runtime

Hi,

My code must work for random variable in random time.
or in other words I want change a random variable in runtime but It will change at end of every ten seconds(or in random time) ?
i could not.

How can i add random time for change variable in runtime?

Code (JavaScript):

1. #pragma strict
2.  
3.  
4. public static var spdGrupOne = Random.Range(12,18);
5.  
6. function Start () {
7.  
8. }
9.  
10.  
11. function Update () {
12.  
13.     Debug.Log(spdGrupOne);
14.  
15. }
16.  

 

Problem solved.
thanks