My code is still not making the frog move.

private Animator playerAnimator;
private float moveHorizontal;
private float moveVertical;
private Vector3 movement;

// Use this for initialization 
void Start () {
    // gather the animator componet from player
    playerAnimator = GetComponent<Animator> ();



}

// Update is called once per frame
void Update () {
    // gathering input 
    moveHorizontal = Input.GetAxisRaw ("Horizontal");
    moveVertical = Input.GetAxisRaw ("Vertical");

    movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
}

void FixedUpdate () {
    // tests if the keys are bring pressed
    if (movement != Vector3.zero) {
        playerAnimator.SetFloat ("Speed", 3f);
    } else {
        playerAnimator.SetFloat ("Speed", 0f);}


    }