BEGINNER QUESTION: is there any way to improve this script in order to get the animation working properly???

my animation doesn't seem to be working and guys pls help. i have created a animation and did my script part and the all damn thing just does not work.

 #pragma strict
 
 var Effect : Transform;
 var TheDammage = 100;
 var CM901 : Transform;
 
 function Update () {
     
     var hit : RaycastHit;
     var ray : Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5, 0));
     
     if (Input.GetButtonDown("Fire1"))
     {
         animation.Play("CM901Shooting");
         
         if (Physics.Raycast (ray, hit, 100))
         {
             var particleClone = Instantiate(Effect, hit.point, Quaternion.LookRotation(hit.normal));
             Destroy(particleClone.gameObject, 2);
             hit.transform.SendMessage("ApplyDammage", TheDammage, SendMessageOptions.DontRequireReceiver);
         }
     }
     
 }