CoroutinesLearning

Had difficulties implementing Coroutines per this site http://unitypatterns.com/introduction-to-coroutines/ Can see the code with syntax highlighting here

Problems

I can't figure out the cause of the problem. I've tried restarting Unity and rebooting my PC. I've tried passing string and method names. Nothing ever changes. I'm always consistently getting either 1 Hello when yield comes before Debug.Log, and 2 Hellos when yield comes after. Any ideas??? I literally only put this online to ask this question here. I really think I need to have Coroutines work properly, I don't know what the source of the problem is.

non-functioning output, only shows once/twice

working output

code

Version:

Unity 4.3.4