How to change the Bool for only a single prefab GameObject creating with Instantiate?

Hi, newbie here. My aim is to turn the color of each created object first to white then to black. My problem is that I couldn't figure out how to assign and / or check the bool for each created object. It's my code here :`

 public class GameManager : MonoBehaviour
 {
     [SerializeField]
     GameObject ballPreF;
     [SerializeField]
     Transform ballPanel;
     //bool checkPBall = true;
     GameObject[] ballsArray = new GameObject[10]; //This number is increasing
     GameObject selectedBall;
 
 
     void Start()
     {
         BallCreator();
     }
 
     public void BallCreator()
     {
         for (int i = 0; i < 10; i++)
         {
             GameObject ball = Instantiate(ballPreF, ballPanel);
             ball.transform.GetComponent<Button>().onClick.AddListener(() => ClickedB());
             ballsArray[i] = ball;
         }
     }
 
     void ClickedB()
     {
         selectedBall = UnityEngine.EventSystems.EventSystem.current.currentSelectedGameObject;
         bool checkPBall = true;
         if (checkPBall == true)
         {
             selectedBall.transform.GetComponent<Image>().color = new Color(255, 255, 255);
             checkPBall = false;
             //Debug.Log(checkPBall);
         }
         else if (checkPBall == false) //not working i don't know why??
         {
             selectedBall.transform.GetComponent<Image>().color = new Color(0, 0, 0);
             selectedBall.transform.GetComponent<Button>().interactable = false;
             //Debug.Log(checkPBall);
             return;
         }
 
         Debug.Log(checkPBall); //return false
         //UnityEngine.EventSystems.EventSystem.current.currentSelectedGameObject.transform.GetComponent<Image>().color = new Color(255, 255, 255);
     }
 }

`