Unity audio solution

So I've been looking around and can't find a way for audio to work in my game.

I think I may be going about this in the wrong way so if someone could point me in the right direction that'd be fantastic.

I have the following script, which is set on a cube with an audiosource. I intended to have all the games sounds (excluding music) run on this script/object seeing as they're 2D sounds. When lightning is active I want it to play the sound, which it does, one time. After that, no other sounds work, like the powerup sound or if another lightning object is active.

The soundStop function was just me trying to see if stopping audio after time would help but it didn't. I just can't seem to figure out audio in Unity. Everything else I'm okay with.

 @script RequireComponent(AudioSource)
 var powerUp : AudioClip;
 var playerHit : AudioClip;
 var enemyHit : AudioClip;
 var lightningStrike : AudioClip;
 var lightningStrike2 : AudioClip;
 var enemyDie : AudioClip;
 
 static var waiting : boolean = false;
 
 function Start () {
 
 DontDestroyOnLoad(this);
 
 }
 
 function Update () {
 
 if (PlayerCollision.lightningStrike == true && waiting == false){
 
 waiting = true;
 soundStop();
 //audio.clip = lightningStrike;
 audio.PlayOneShot(lightningStrike);
 
 }
 
 if (PlayerCollision.pickupItem == true && waiting == false){
 
 waiting = true;
 soundStop();
 //audio.clip = powerUp;
 audio.PlayOneShot(powerUp);
 
 }
 
 }
 
 
 function soundWait(){
 
 yield WaitForSeconds(0.1);
 
 waiting = false;
 
 }
 
 function soundStop () {
 
 yield WaitForSeconds(1);
 
 audio.Stop();
 
 }