Making an object move randomly

[Vigilantae]

I'm working on a game where I want an object to move to a random place every couple of seconds. I don't know how to make the object move after being placed randomly for the first time. This is my current code:

onClipEvent(load){
this._x = random(600);
this._y = random(450);
}

Is there a way for me to add a timer that tells it when to move or something?
Any help would be appreciated.

[Bigmutha]

Most people use the built in timer to do timed things.
I haven't ever really learned it, but I think you use

startTimer();

to start it. And

getTimer();

to get the amount of time currently on the counter.
And by default it's in milliseconds or something.
(Don't quote me on this, I'm not great.)