enable/disable from script

TwoClasses.cs

////////////////////////////////////////////
//This first class has the Open/Close functionality, put it on a Cube or something
////////////////////////////////////////////
using UnityEngine;
using System.Collections;

public class openclose : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		this.transform.Rotate (new Vector3 (0, 1, 0), Time.smoothDeltaTime*5.0f);
	}

	public void Open() {
		this.enabled = true;
	}

	public void Close() {
		this.enabled = false;
	}
}
////////////////////////////////////////////
//This next class operates the object above, put it on a Camera or something
////////////////////////////////////////////
using UnityEngine;
using System.Collections;

public class timeroperate : MonoBehaviour {
	private float TimeLeft = 3.0f;
	public openclose target = null;
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		if(target) {
			TimeLeft -= Time.smoothDeltaTime;
			if(TimeLeft < 0.0f) {
				Debug.Log("Timer Triggered.");
				if(target.enabled) {
					target.Close();
				}
				else {
					target.Open();
				}
				TimeLeft = 3.0f;
			}
		}
	}
}