CharacterController in instance object

Hello.

I have a question. I created object by "Object.Instantiate" in Script asigned to Object1. In that script i added

localPlayer.AddComponent(); localPlayer.AddComponent (); In PlayerController i have:

using UnityEngine; using System.Collections;

public class PlayerController : MonoBehaviour {

 public float speed;
 private Vector3 position;

 CharacterController controller = GetComponent<CharacterController>();


 //do inicjalizacji
 void Start() {
     position = transform.position;

 }

 //Wywoływane raz co klatke
 void Update () {
     if(Input.GetMouseButton(0))
     {
         //Lokalizuje gdzie kliknięto w teren
         locatePosition();
     }
     //Porusz sie do pozycji 
     moveToPosition ();

 }

 void locatePosition()
 {
     RaycastHit hit;
     Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
     if(Physics.Raycast(ray, out hit,1000))
     {
         position = new Vector3(hit.point.x, hit.point.y, hit.point.z);
     }
     Debug.Log (position);
 }
 void moveToPosition()
 {

         //if (Vector3.Distance (transform.position, position) > 1) {
             Quaternion newRotation = Quaternion.LookRotation (position - transform.position);
             newRotation.x = 0f;
             newRotation.z = 0f;
             transform.rotation = Quaternion.Slerp (transform.rotation, newRotation, Time.deltaTime * 10);
             controller.SimpleMove (transform.forward * speed);

     //  }
 //
 }

} I get a error : "error CS0236: A field initializer cannot reference the nonstatic field, method, or property `UnityEngine.Component.GetComponent(System.Type)'" What i can do to repair it?

Sorry for my english.