Unity: Enable the camera to rotate around a certain point for one week

if (turnAround)
  {
    (, ,  * rotateSpeed);
    degree +=  * rotateSpeed;
    if (degree >= 360)
    {
      turnAround = false;        
      degree = 0;
     }
   }

public Transform Camera2;
public GameObject target;
private float dis;
public float xSpeed = 200, ySpeed = 200, mSpeed = 10;                   //Movement speedpublic float yMinLimit = -50, yMaxLimit = 50;                           //The minimum maximum limit on the Y-axis movement of the camerapublic float distance = 7, minDistance = 2, maxDistance = 30;           //The distance between the camera and the target objectpublic bool needDamping = true;                                         //Damping is turned on by defaultfloat damping = 5.0f;                                                   //The default damping is 5.0Fpublic float x = 0.0f;                                                  //X axispublic float y = 0.0f;                                                  //Y axis// Use this for initialization
void Start() {
    instance = this;
    Camr = ;
    Vector3 angles = ;
    x = ;
    y = ;  
}
private void Update()
{
}
void LateUpdate()
{
            // Use the left mouse button to move the object            if ((1))
            {
                x += ("Mouse X") * xSpeed * 0.02f;
                y -= ("Mouse Y") * ySpeed * 0.02f;
                y = ClampAngle(y, yMinLimit, yMaxLimit);
            }
            distance -= ("Mouse ScrollWheel") * mSpeed;
            distance = (distance, minDistance, maxDistance);
            Quaternion rotation = (y, x, 0.0f);
            Vector3 disVector = new Vector3(0.0f, 0.0f, -distance);
            Vector3 position = rotation * disVector + ;
            //adjust the camera
            if (needDamping)
            {
                 = (, rotation,  * damping);
                 = (, position,  * damping);
            }
            else
            {
                 = rotation;
                 = position;
            }   
}
/// <summary>
/// Control of rotation angle/// </summary>
/// <param name="angle">Rotation angle</param>/// <param name="min">Minimum angle</param>/// <param name="max">Maximum angle</param>/// &lt;returns&gt;&lt;/returns&gt;
static float ClampAngle(float angle, float min, float max)
{
    if (angle &lt; -360)
        angle += 360;
    if (angle &gt; 360)
        angle -= 360;
    return (angle, min, max);
}
void MoveCameraToTarget()
{
    if (target != null)
    {
        ();
         = (, , 5 * );
        dis = (, );
        if (dis &lt; 1.5f)
        {
            Camr = ;
            CancelInvoke();
        }
    }
}