Help with Time still for enemy AI patrol

So I have a script and i want to add it to when it gets to a point the enemy should wait a little. Here is the code:

using UnityEngine; using System.Collections;

public class EnemyPatrolAI : MonoBehaviour {

 float startingPos; float endPos;
 public float moveSpeed = 1f;
 public int unitsToMove = 5;
 public int velocity = 1;
 public Transform transform;
 public Animator anim;
 public float timeStill = 2f;

 public bool facingRight;

 void Start() 
 {
 }

 void Awake() { startingPos = transform.position.x; endPos = startingPos + unitsToMove; }

 public void FixedUpdate() 
 {

     if (facingRight) 
     {
         GetComponent<Rigidbody2D>().velocity += new Vector2 (moveSpeed, GetComponent<Rigidbody2D>().velocity.y);
     }

     if (GetComponent<Rigidbody2D>().position.x >= endPos) 
     {
         facingRight = false;
         if (facingRight == false) 
         {
             transform.localScale = new Vector2(-1, transform.localScale.y);
             anim.SetBool ("moving", true);
         }
     }

     if (!facingRight) 
     {
         GetComponent<Rigidbody2D>().velocity -= new Vector2 (moveSpeed, GetComponent<Rigidbody2D>().velocity.y);
     }

     if (GetComponent<Rigidbody2D>().position.x <= startingPos) 
     {
         facingRight = true;
         if (facingRight == true) 
         {
             transform.localScale = new Vector2(1, transform.localScale.y);
             anim.SetBool ("moving", true);
         }
     }

     if (GetComponent<Rigidbody2D>().velocity.magnitude > moveSpeed) 
     {
         GetComponent<Rigidbody2D>().velocity = GetComponent<Rigidbody2D>().velocity.normalized * moveSpeed;
     }
 }
     

}

Thanks for help!