AS2 How to make a button that moves every two seconds

How can I make a button that moves every two seconds by itself in ActionScript2?

At the moment, I have to use the on(press) command, but what I really need is for the button to be able to move randomly by itself every two seconds. For example:

(insert the code here) {

     bc1._x = random(250)

     bc1._y = random(250)

}

Thanks!