instantiate keeps repeating itself

I'm new to unity and c# but I have been trying to recreate the game color switch. I followed the tutorial online about how to make the wheels, their rotations, collisions and the basic player mechanics. However, the tutorial did not show how to make the game infinite therefore for the past 9 hours I have been trying to accomplish that. I keep running into the same problem where the rings (only the larger one inside the smaller one) spawn multiple times when the green dot which gives the point and spawns in a new circle is consumed. I know there is probably a stupid error and you think I'm just trying to waist peoples time however I am really stuck and any help is appreciated. Thank you.`

 using UnityEngine;

 using UnityEngine.SceneManagement;

 public class Player : MonoBehaviour {

 public float jumpForce = 7f;

 public Rigidbody2D rb;

 public SpriteRenderer sr;

 public string currentColor;

 public GameObject Green;

 public GameObject[] obj;

 public float SpawnAmount = 1f;

 public Color ColorBlue;
 public Color ColorPurple;
 public Color ColorYellow;
 public Color ColorPink;
 public int Score = 0;
 public int Height = 0;
 Vector3 CurrentSpawnPoint;
 private void Start()
 {
     SetRandomColor();
 }



 void Update() {

     if (Input.GetButtonDown("Jump") || Input.GetMouseButtonDown(0))
     {
         rb.velocity = Vector2.up * jumpForce;
     }

 }
 void OnTriggerEnter2D(Collider2D col)
 {
     if (col.tag == "Change")
     {
         SetRandomColor();
         Destroy(col.gameObject);
         return;
     }

     else if (col.tag == "Point")
     {
         Debug.Log("Point gained");
         Destroy(col.gameObject);
         Score += 1;
         Height += 7;
         CurrentSpawnPoint = col.transform.position;
         CurrentSpawnPoint.y += 7;
         Instantiate(Green, CurrentSpawnPoint, Quaternion.identity);
         Instantiate(obj[Random.Range(0, obj.GetLength(0))], CurrentSpawnPoint, Quaternion.identity);
         
         Debug.Log(Height);
         Debug.Log(CurrentSpawnPoint);
         return;
     }

     else if (col.tag != currentColor)
     {
         Debug.Log("GAME OVER");
         SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
     }
 }
 void SetRandomColor()
 {
     int index = Random.Range(0, 4);

     switch (index)
     {
         case 0:
             currentColor = "Blue";
             sr.color = ColorBlue;
             break;
         case 1:
             currentColor = "Yellow";
             sr.color = ColorYellow;
             break;
         case 2:
             currentColor = "Purple";
             sr.color = ColorPurple;
             break;
         case 3:
             currentColor = "Pink";
             sr.color = ColorPink;
             break;
     }


 }

}`