sprite manager 2 animation control

I am trying to figure out how to control the animations in a script with SM2.

here below is my script but i want to find out how or what do I need to change so the animations will play.

Code (csharp):

1.  
2.  
3.  
4. var speed : float = 0.01;
5. var updown : float = 0.01;
6.  
7. //var bird : PackedSprite;
8.  
9. function Update () {
10.    
11.   // var bird : PackedSprite = gameObject.GetComponent("PackedSprite");
12.    
13.     var translation : float = Input.GetAxis ("Horizontal") * speed;
14.     var updown : float = Input.GetAxis ("Vertical") * speed;
15.    
16.     translation *= Time.deltaTime;
17.     updown *= Time.deltaTime;
18.  
19.     transform.Translate (translation, updown , 0);
20.    
21.     if (translation > 0 )
22.      {
23.      transform.localScale = Vector3(-1,1,0);
24.      //bird.PlayAnim(0);
25.      }  
26.      
27.      else (translation < 0 )
28.      {
29.      transform.localScale = Vector3(1,1,0);
30.      //bird.PlayAnim(1);
31.      }  
32.