Problem with connecting between the Walk mode and Idle mode, they are mix

Hello guys

I'm trying to make connection between Animation and the player and this is my script for the players movement

using UnityEngine; using System.Collections;

public class Player : MonoBehaviour {

 public float maxSpeed = 3;
 public float speed= 50f;
 public float jumpPower= 150f;

 public bool grounded;

 private Rigidbody2D rb2d;
 private Animator animator;


 void Start ()
 {

     rb2d = gameObject.GetComponent<Rigidbody2D> ();
     animator = gameObject.GetComponent<Animator> ();

 
 }
 
 void Update ()
 {
 
     animator.SetBool ( "Grounded",grounded);
     animator.SetFloat ("Speed",Mathf.Abs(Input.GetAxis("Horizontal"))); 

     if (Input.GetAxis ("Horizontal") < -0.1f)
     {
         transform.localScale = new Vector3 (-12, 10, 1);
     }

     if (Input.GetAxis ("Horizontal") > 0.1f)
     {
         transform.localScale = new Vector3 (12, 10, 1);
     }



 }

 void FixedUpdate()
 {

     float h = Input.GetAxis ("Horizontal");


     //Moving the player
     rb2d.AddForce((Vector2.right * speed)* h);


     //Limiting speed of the player
     if(rb2d.velocity.x > maxSpeed)
     {
 
         rb2d.velocity = new Vector2 (maxSpeed, rb2d.velocity.y);
     
     }

     if (rb2d.velocity.x < -maxSpeed) 
     {

         rb2d.velocity = new Vector2 (-maxSpeed, rb2d.velocity.y);

     }

 }

}

whats wrong with this? why my player mix with the idle mode and with the walk mode? please help :D