How do i Instantiate sub-Points with in Multiple Points??

Hello i am having trouble trying to make sub-Points(RedSphere) with in Points(Cube) and then add the

sub-Points(RedSphere) as childs to the Points(Cube), so i can move a Cube with its Sub-Points(Redsphere) attached to it, see in Pic1 so you know what i mean exactly. And here are the results i am getting which is in Pic2, does anyone know how to do this.

-Pic1 (i randomized the Cubes so you can tell what i mean) -Pic2 (The results i am getting with the code Below) And Here is the code so you know what i have done.

 using UnityEngine;
 using System.Collections;
 
 public class Points : MonoBehaviour {
 
     private Vector3[] cubePoints;
     private Vector3[] spherePoints;
 
     public GameObject cubePrefab;
     public GameObject spherePrefab;
 
     public int cubeAmount, sphereAmount, offset;
     void Start()
     {
         cubePoints = new Vector3[(cubeAmount + 1)];
         for (int i = 0, x = 0; x <= cubeAmount; i++, x++)
         {
             cubePoints[i] = new Vector3(x * offset, 0);
             Instantiate(cubePrefab, cubePoints[i], Quaternion.identity);
         }
         spherePoints = new Vector3[(sphereAmount + 1)];
         for (int i = 0, z = 0; z < sphereAmount; i++, z++)
         {
 
             spherePoints[i] = new Vector3(0, 0, z);
             Vector3 position = spherePoints[i];
             Instantiate(spherePrefab, position, Quaternion.identity);
             position = cubePoints[i];
         }
 }
 }