Play animation when shooting?

var bullet : Rigidbody; var speed = 20;

function Update () {

  if (Input.GetButtonDown("Fire1")) {

  //play animation "shoot"
  var clone : Rigidbody;
  clone = Instantiate(bullet, transform.position, transform.rotation);
  
 
  clone.velocity = transform.TransformDirection (Vector3.forward * speed);
  }

}