Small Issue About RotateAround

Unity Engine
,
1

Hi guys im a newbie of unity and also english :smile: so i have small issue about rotatearound
the problem is think like this i wanna try instantiate 2 square and 1 sphere so sphere should be rotatearound in z rotation okay there is no problem but when i instantiate the second 2 square and 1 sphere then the first instantiated sphere going to reference second i only want to every instantiated sphere should be rotate its own reference i tried different kind of code but i couldnt achieve so if u can help me thanks

Imgur 

int r1 = Random.Range(0, 7);
       // int r2 = Random.Range(0, 7);
       //int r3 = Random.Range(0, 7);
        GameObject gm1 = Instantiate(_randomsq[r1], new Vector3(-2.46f, p, 0f), Quaternion.identity);
        gm1.transform.localScale = new Vector3(1.5f, 1.5f);
        GameObject gm2 = Instantiate(_randomsq[r1], new Vector3(2.46f, p, 0f), Quaternion.identity);
        gm2.transform.localScale = new Vector3(1.5f, 1.5f);
        GameObject gm3 = Instantiate(_randomsp[r1], new Vector3(-2.46f, p, 0f), Quaternion.identity);
        gm3.transform.localScale = new Vector3(0.8f, 0.8f);
        rotara  = gm1.gameObject.transform.position.y;
        gm3.AddComponent<rotatearaound>();
        gm1.transform.parent = GameObject.Find("SpawnManager").transform;
        gm2.transform.parent = GameObject.Find("SpawnManager").transform;
        gm3.transform.parent = GameObject.Find("SpawnManager").transform;
            p += 2.45f;

rotatearound code
ransform.RotateAround(new Vector3(0, _level.p, 0), new Vector3(0, 0, 1), 90f * Time.deltaTime);
       // transform.RotateAround(Vector3.zero, Vector3.forward, 90 * Time.deltaTime);
        //transform.RotateAround(new Vector3(0, _level.rotara, 0), new Vector3(0, 0, 1), 90f * Time.deltaTime);
2

i fixed it like this
created coroutine in while loop assing the y axis to x(variable) in if statement
float rot = 0;
IEnumerator rotara()
{
if(1 > rot)
{
float x = _level.rotara;
while (true)
{
transform.RotateAround(new Vector3(0, x, 0), new Vector3(0, 0, 1), 90f * Time.deltaTime);
rot = 1;
yield return new WaitForSeconds(0.01f);
}
}
}