Setting alpha on individual objects.

#pragma strict
internal var fading : boolean = false;

function Start () {
	yield WaitForSeconds(1.2);
	fading = true;

function FixedUpdate () 
	if (fading ==a true)
	this.renderer.material.color.a = this.renderer.material.color.a-0.01;

I am using this simple script to fade the color of a projectile. The first one works correctly, but all projectiles after that come out with an alpha of 0. How can I fix this/what is going wrong?

I had to make the object that I was instantiating a prefab.