working yield return

gistfile1.cs

using UnityEngine;
using System.Collections;

public class YieldTest : MonoBehaviour {
    public IEnumerator Do() {
        print("Do now");
        yield return new WaitForSeconds(2);
        print("Do 2 seconds later");
    }
    public void Awake() {
        StartCoroutine("Do");
        print("This is printed immediately");
    }
}