Randomizing Audio

I’m just gonna ask a quick question, If I have for example 6 sounds, how would I be able to randomize what sound should play every half second? I think it can be something like this so this is what I have so far:

var Sound1 : AudioClip;
var Sound2 : AudioClip;
var Sound3 : AudioClip;
var Sound4 : AudioClip;
var Sound5 : AudioClip;
var Sound6 : AudioClip;

function Update()
//randomize function here

//I think I have to make a repeat every second

@script RequireComponent(AudioSource)

I would be happy if I could get some help to understand randomizing etc.