Rotating everything in an array?

Hello!
Im trying to rotate everything inside an array. I have this code, what needs tweaking?

using UnityEngine;
using System.Collections;

public class Rotation : MonoBehaviour {

	public GameObject[] blocksOnLevel;

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		blocksOnLevel = GameObject.FindGameObjectsWithTag("Blocks");
		
	}

	public void turnLeft () 
	{
		foreach(GameObject go in blocksOnLevel)
		{
			transform.Rotate(Vector3.left * Time.deltaTime);
		}	
		print("Im working");
	}
}

Hi,
you are not calling your turn function and also you are looking for all your objects every frame (update) which is too heavy and will hurt your performance.
Try this:

using UnityEngine;
 using System.Collections;
 
 public class Rotation : MonoBehaviour {
 
     public GameObject[] blocksOnLevel;
     public bool turnBlocks;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         if(turnBlocks == true) turnLeft();
         
     }
 
     public void turnLeft () 
     {
          blocksOnLevel = GameObject.FindGameObjectsWithTag("Blocks");
          foreach(GameObject go in blocksOnLevel)
         {
             transform.Rotate(Vector3.left * Time.deltaTime);
         }    
         print("Im working");
     }
 }

then change your boolean via a game event, a button or something.
Hope that helps,