After searching for a while, I finally found a PDF document by Roxaneh Chamlou on FAA site that has it. I wish Microsoft has concise sample diagrams that show how some of these non-standard shapes are intended to be used.
Here is a sample diagram that I have created taking a cue from the above PDF document:
This diagram should be self explanatory and I would love to hear what you think about it? Is there a better way to show the loop either with or with out "Loop Limit" shape?
Hope this helps someone out there.