Creating a Flashing Color Script

Unity Engine
1

I want to create a christmas lighting effect where the colors flash different colors I was thinking something like this yet I don’t quite know…can anyone help?

using UnityEngine;
using System.Collections;

public class FlashColorScript : MonoBehaviour 
{
	public GUIText myText;
	public Color myTextColor;

	void Update () 
	{
		myText.material.color = myTextColor;
		StartCoroutine (Yield ());
	}

	IEnumerator Yield()
	{
		yield return new WaitForSeconds (1);
	}
}
2

Here is what it looks like done but when I assign the GUItext variable to the text it disappears :confused:

using UnityEngine;
using System.Collections;

public class FlashColorScript : MonoBehaviour 
{
	public GUIText myText;
	public Color myTextColor1;
	public Color myTextColor2;

	void Update () 
	{
		myText.material.color = myTextColor1;
		StartCoroutine (Yield ());
		myText.material.color = myTextColor2;

	}

	IEnumerator Yield()
	{
		yield return new WaitForSeconds (1);
	}
}