How to make a object go and come back with a mouse click

This code will move to an object then come back and go and back so on, you would have to edit it but it goes between two objects. It has a move speed, not a timer... set the move speed for the time you want...

 using UnityEngine;
 using System.Collections;
 
 public class Move_Opstacle : MonoBehaviour {
     public float move_speed;
 
     public GameObject target;
     public GameObject back;
 
     GameObject targetSupostTo;
     void Start()
     {
         targetSupostTo = target;
         InvokeRepeating ("MoveTowardsTarget", 0,0.01f);
     }
     //move towards a target at a set speed.
     private void MoveTowardsTarget() {
         //the speed, in units per second, we want to move towards the target
         float speed = move_speed;
         //move towards the center of the world (or where ever you like)
         Vector3 targetPosition = target.transform.position;
 
         Vector3 currentPosition = this.transform.position;
         //first, check to see if we're close enough to the target
         if (Vector3.Distance (currentPosition, targetPosition) > .1f) { 
             Vector3 directionOfTravel = targetPosition - currentPosition;
             //now normalize the direction, since we only want the direction information
             directionOfTravel.Normalize ();
             //scale the movement on each axis by the directionOfTravel vector components
 
             this.transform.Translate (
                 (directionOfTravel.x * speed * Time.deltaTime),
                 (directionOfTravel.y * speed * Time.deltaTime),
                 (directionOfTravel.z * speed * Time.deltaTime),
                 Space.World);
         } else 
         { //closer then .1
             if (targetPosition != targetSupostTo.transform.position) {//change to targetSupostTo
                 //print("targetPosition != targetSupostTo.transform.position");
                 target = targetSupostTo;
             } else {//change to back
                 //print("targetPosition == targetSupostTo.transform.position");
                 target = back;
             }
         }
     }
 }