Spawning objects at 3 spawn points randomly one at a time.

Hello. I’m new here and I have this simple practice code. I would like to spawn objects on three different locations of my boxes. One ball will spawn then after around 1 second, another one will spawn in another location. It would be random on the 3 spawn boxes.

here is a piece of my spawner code:

public Rigidbody box;
public bool readynow = true;
float delay = 0.8f;

IEnumerator makeBox()
{
    readynow = false;
    Instantiate(box, transform.position, transform.rotation);        
    yield return new WaitForSeconds(delay);        
    readynow = true;  
}

You need to generate a random value out of three to determine the random position among three.I think this will help(The code is not tested)

//The rigidbody object 
public Rigidbody box;
        
//Declare the three different locations
public Pos_A;
public Pos_B;
public Pos_C;
        
private InstantiatePos;
        
int ID=0;
        
void Start()
{
   InvokeRepeating("InstantiateObject", 1, 1);
}
        
void InstantiateObject()
{
   //Will get a random number between 0-2
   ID=Random.Range(0,3);
        
   swtich(ID)
   {
      case 0:
      InstantiatePos=Pos_A;
      break;
        
      case 1:
      InstantiatePos=Pos_B;
      break;
        
      default:
      InstantiatePos=Pos_C;
      break;
    }
        
    Instantiate(box, InstantiatePos, transform.rotation);
}