animation problem on character movement

I atached these script to the player .
And added animations.
And it moving perfectly, but the problem is when i click play,
it playing the moveP animation automatically.
How can i make it. If i moving only then play the MoveP animation else play IdleP animation,

I am actually verry new on this


Here is the script :

Code (csharp):

1. using UnityEngine ;
2. using System. Collections ;
3. public class Move : MonoBehaviour {
4.    
5.     //movement variable
6.     public float speed ;
7.     public float jumpSpeed ;
8.     public float gravity ;
9.     private Vector3 moveDirection = Vector3.zero ;
10.     private CharacterController controller ;
11.     public float jumpInterval = 5 ;
12.     private float nextJump = 0 ;
13.    
14.    
15.     // Animation variable
16.    
17.     public AnimationClip moveP;
18.     public AnimationClip IdleP;
19.     public AnimationClip Jump;
20.    
21.    
22.     void Awake (){
23.         controller = GetComponent<CharacterController>();
24.     }
25.    
26.     void Update (){
27.         movePosition();
28.        
29.     }
30.     void movePosition(){       
31.         if (controller.isGrounded ){           
32.             moveDirection = new Vector3 (Input.GetAxis("Horizontal"), 0 , 0);      
33.             moveDirection *= speed ;
34.             animation.Play (moveP.name);
35.             if (Input.GetButton("Jump")&&Time.time>nextJump )
36.             {
37.                 moveDirection.y = jumpSpeed ;
38.                 nextJump = Time.time + jumpInterval ;
39.                 animation.Play (Jump.name);
40.             }          
41.         }else{
42.            animation. Play(IdleP.name);
43.       }
44.    
45.            
46.         moveDirection.y -= gravity * Time.deltaTime ;
47.         controller.Move(moveDirection * Time.deltaTime);           
48.     }
49. }
50.  

 

any Idea?