[HELP] How to make an object spawn and follow the player

Hello. I'm trying to build a laser defender type of game. I added some power-ups to fall from enemies at a random probability. I've decided to add a power-up that spawns a new player ship that has to follow the players ship. How can i make the new spawn move on it's own and follow the player (like in the Super Gradius NES game if someone still remembers it, where you could spawn a red orb following the player and shooting with the same power and fire rate as the player). I mean the clone should start to move when the player's ship is at an X distance away from the clone.

Here is what i mean in pictures:

Here are the codes for the player and the player clone:

Player:

using UnityEngine; using UnityEngine.UI; using System.Collections;

public class PlayerController : MonoBehaviour { public float speed = 3.0f; public float padding = 1f; public GameObject[] projectiles = new GameObject[15]; public GameObject[] ships = new GameObject[3]; public float projectileSpeed; public float fireRate = 0.2f; public int health = 100; public int armor = 100; public int damag = 100; //public Canvas canvas; //public Sprite[] laserSprites = new Sprite[15]; public int amountUpgrades; public PlayerClone[] playerClones = new PlayerClone[3];

 public AudioClip destroyed;
 public AudioClip shoot;

 float xmin;
 float xmax;
 int i = 0;
 public int newArmor;
 public int newHealth;
 public float newSpeed;
 public static int newDamage;

 int dmgUp = 0;
 int projectilesIndex = 0;
 LevelManager levelmanager;

 void Start(){
     if(Application.loadedLevelName == "02 Level_01"){
         newArmor = armor;
         newHealth = health;
         newSpeed = speed;
         newDamage = damag;
     }
     // Defining the play space edges
     float distance = transform.position.z - Camera.main.transform.position.z;
     Vector3 leftmost = Camera.main.ViewportToWorldPoint(new Vector3(0,0,distance));
     Vector3 rightmost = Camera.main.ViewportToWorldPoint(new Vector3(1,0,distance));
     xmin = leftmost.x + padding;
     xmax = rightmost.x - padding;
     Debug.Log(newArmor);
     Debug.Log(newHealth);
     Debug.Log(newDamage);
     Debug.Log(newSpeed);
 }

 void Update () {
     // Moving left or right
     if(Input.GetKey(KeyCode.LeftArrow)){
         transform.position += Vector3.left * speed * Time.deltaTime;
     }else if(Input.GetKey(KeyCode.RightArrow)){
         transform.position += Vector3.right * speed * Time.deltaTime;
     }

     // Resctricting the player to the game space
     float newX = Mathf.Clamp(transform.position.x,xmin,xmax);
     transform.position = new Vector3(newX,transform.position.y,transform.position.z);

     // Creating lasers when space is pressed
     if(Input.GetKeyDown(KeyCode.Space)){
         InvokeRepeating("Fire", 0.000001f, fireRate);
     }
     if(Input.GetKeyUp(KeyCode.Space)){
         CancelInvoke("Fire");
     }
 }

 void OnTriggerEnter2D (Collider2D collider){
     EnemyProjectile missile = collider.gameObject.GetComponent<EnemyProjectile>();
     if (missile) {
         //Debug.Log ("Enemy scored a hit!");
         Debug.Log(health);
         if(EnemyProjectile.damage > armor){
             health -= missile.GetDamage () - armor;
             Debug.Log(health);
             missile.Hit ();
         }else{
             missile.Hit();
         }

     }
     if (health <= 0) {
         Die ();
     }

     PowerUps Powerup = collider.gameObject.GetComponent<PowerUps>();
     if(Powerup){
         //Debug.Log("Power up");
         if(Powerup.armorUpgrade != 0){
             //Debug.Log("Armor");
             newArmor += Powerup.ArmorUpgrade();
             Debug.Log(newArmor);
         }else if(Powerup.damageUpgrade != 0){
             //Debug.Log("Damage");
             newDamage += Powerup.DamageUpgrade();
             dmgUp++;
             //Debug.Log(missile.damage);
             //Debug.Log(dmgUp);
             if(projectilesIndex < 15){
                 if(dmgUp == amountUpgrades){
                     projectilesIndex++;
                     dmgUp = 0;
                 }
             }

         }else if(Powerup.speedUpgrade != 0){
             Debug.Log("Speed");
             newSpeed += Powerup.SpeedUpgrade();
             Debug.Log(newSpeed);
         }else if(Powerup.healthReturn != 0){
             Debug.Log("Health");
             newHealth += Powerup.HealthUpgrade();
             Debug.Log(newHealth);
         }else if(Powerup.doubleShip != 0){
             if(i <= 2){
                 Instantiate(ships[i],transform.position,Quaternion.identity);
                 i++;
             }                
         }
         Powerup.Hit();
     }
 }

 void Die(){
     //man = GameObject.Find("LevelManager").GetComponent<LevelManager>();
     levelmanager = GameObject.Find("LevelManager").GetComponent<LevelManager>();
     levelmanager.LoadLevel("03b Lose");
     Destroy(gameObject);
 }

 void Fire(){
     Vector3 offset = new Vector3(0,1,0);
     GameObject beam = Instantiate(projectiles[projectilesIndex], transform.position + offset, Quaternion.identity) as GameObject;
     beam.rigidbody2D.velocity = new Vector3(0,projectileSpeed,0);
     AudioSource.PlayClipAtPoint(shoot,transform.position);
 }

}

Player Clone:

using UnityEngine; using System.Collections;

public class PlayerClone : MonoBehaviour { public AudioClip shoot; public GameObject playerLaser; float projectileSpeed = 5f; float speed = 3f; float fireRate = 0.2f;

 float xmin;
 float xmax;

 float padding = 1f;


 void Start(){
     float distance = transform.position.z - Camera.main.transform.position.z;
     Vector3 leftmost = Camera.main.ViewportToWorldPoint(new Vector3(0,0,distance));
     Vector3 rightmost = Camera.main.ViewportToWorldPoint(new Vector3(1,0,distance));
     xmin = leftmost.x + padding;
     xmax = rightmost.x - padding;
 }

 void Update(){
     if(Input.GetKeyDown(KeyCode.Space)){
         InvokeRepeating ("Fire",0.00001f,fireRate);
     }
     if(Input.GetKeyUp(KeyCode.Space)){
         CancelInvoke("Fire");
     }
     // Moving left or right
     if(Input.GetKey(KeyCode.LeftArrow)){
         transform.position += Vector3.left * speed * Time.deltaTime;
     }else if(Input.GetKey(KeyCode.RightArrow)){
         transform.position += Vector3.right * speed * Time.deltaTime;
     }
     
     // Resctricting the player to the game space
     float newX = Mathf.Clamp(transform.position.x,xmin,xmax);
     transform.position = new Vector3(newX,transform.position.y,transform.position.z);
 }

 void Fire(){
     Vector3 offset = new Vector3(0,1,0);
     GameObject beam = Instantiate(playerLaser, transform.position + offset, Quaternion.identity) as GameObject;
     beam.rigidbody2D.velocity = new Vector3(0,projectileSpeed,0);
     AudioSource.PlayClipAtPoint(shoot,transform.position);
 }

}