how to set custom parameters to GameObjects and access them?

im trying to set a custom parameters to my GameObjects and access these parameters of one object by clicking on another object. So, i have this useless code that will help me figure out whats going on.

BaseScript.cs:

 using UnityEngine;
 using System.Collections;
 
 public class BaseScript : MonoBehaviour {
 
     public GameObject[] Bricks;
     public GameObject BrickPrefab;
     
     void Start () {
         Bricks = new GameObject[5];
 
         for (int i = 0; i <= 4; i++)
         {
             Bricks[i] = GameObject.Instantiate(BrickPrefab, new Vector3 (BrickPrefab.transform.position.x, i*1.1f, 0), BrickPrefab.transform.rotation) as GameObject;
             Bricks[i].GetComponent<BrickScript>().setCustomParameter("EXAMPLE" + i.ToString());
         }
     }
 
     void Update () {
     
     }
 
     public void myMethod() { 
         Debug.Log (Bricks[0].GetComponent<BrickScript> ().getCustomParameter ());
     }
 }
 

and BrickScript.cs:

 using UnityEngine;
 using System.Collections;
 
 public class BrickScript : MonoBehaviour {
 
     private string CustomParameter;
     public BaseScript baseScript;
     
     void Start () {
     
     }
 
     void Update () {
     
     }
 
     public void setCustomParameter(string CustomParameter) { 
         this.CustomParameter = CustomParameter;
     }
 
     public string getCustomParameter() { 
         return CustomParameter;
     }
 
     void OnMouseDown() {
         baseScript.myMethod ();
     }
 }

So, when i run the game it instantiates a five cubes "Bricks" out of my BrickPrefab. Each Brick has its own CustomParameter (EXAMPLE1, EXAMPLE2...EXAMPLE5) . I can see in the Inspector that these parameters are set properly if i make CustomParameter field public instead of private.

But, when i clicking on each Brick, i expecting "EXAMPLE0" in the console, but it throws me: "IndexOutOfRangeException: Array index is out of range. BaseScript.myMethod () (at Assets/BaseScript.cs:24) BrickScript.OnMouseDown () (at Assets/BrickScript.cs:26) UnityEngine.SendMouseEvents:DoSendMouseEvents(Int32, Int32)"

Here is a screenshot:

Im new to Unity3d and i guess it should be somethink simple. But i just dont understand how to assign everything properly.. May be there is a way to assign things programmatically? So please tell me what i did wrong... Thank you!