if the obiect with the tag "Player" is moving play sound Footstep.wav sequientially with the cadence of it's trasform velocity

using UnityEngine;
using System.Collections;

public class AudioPlay : MonoBehaviour {
  public GameObject player;
  public AudioClip[] footStep;
  public float stepDistance = 0.25f;
  public float stepVolume = 0.5f;
  public float stepPitch = 1.0f;
  float nextStep = 0;
  float stepInterval = 0.5f;
  
  void Update() {
    if (player.transform.position.magnitude > nextStep) {
      AudioClip clip = footStep[Random.Range(0, footStep.Length)];
      AudioSource.PlayClipAtPoint(clip, transform.position, stepVolume);
      
      nextStep = player.transform.position.magnitude + stepDistance;
      stepInterval = clip.length / stepPitch;
    }
  }
}