Collider and Script issue

Hello and thanks in advance.

I am trying to program a scene that when the player collides with an object, the object is then picked up and begins to rotate around the player in a circular pattern around the different vertices. If anyone can point me in the correct direction I would be very much appreciative and send you lots of cookies.

So far I've managed to just have the player destroy the object (by making it disappear), and I get the following error.

UnassignedReferenceException: The variable b of _x has not been assigned.
You probably need to assign the debris variable of the _x script in the inspector.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class _x : MonoBehaviour
5.  
6.  
7. {
8.  
9.     public float speed;
10.     public GameObject b;
11.     public Vector3 bValues;
12.    
13.  
14.    
15.  
16.     void FixedUpdate ()
17.     {
18.         float moveHorizontal = Input.GetAxis ("Horizontal");
19.         float moveVertical = Input.GetAxis ("Vertical");
20.         Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
21.  
22.         GetComponent<Rigidbody>().AddForce(movement * speed * Time.deltaTime);
23.     }
24.    
25.  
26.     void OnTriggerEnter(Collider other)
27.  
28.     {
29.         if (other.gameObject.tag == "x")
30.          
31.         {  
32.          
33.             other.gameObject.SetActive(false);
34.                        
35.          
36.         }
37.  
38.             while  (false);
39.        
40.  
41.         {
42.             Vector3 bPosition = new Vector3 (Random.Range (-bValues.x, bValues.x), Random.Range (-bValues.y, bValues.y), Random.Range (-bValues.z, bValues.z));
43.             Quaternion bRotation = Quaternion.identity;
44.             Instantiate (b, bPosition, bRotation);
45.          
46.         }
47.      
48.     }
49.  
50. }

 

I guess I should more accurately state, I am trying to get an object to orbit the player. But I am wanting first to collide with object than transform it into an orbit status.