The best example I have is a project generating Unique Obama Quotes named Obama Speech Quote Generator!
The first order Rainbow Chain is best used when you have a small corpus. I suggest using a first order for a book or a season of a tv show. Because we are only using a first order Rainbow Chain our grammar will be pretty bad but going to a second order will cause less unique sentences (we will get sentences right from the corpus).
In my example I use the first hunger games to generate unique and seeded quotes.
The second order Rainbow Chain is best used when you have a medium sized corpus. I suggest using a second order for series of books or tv shows. Now that we have a second order we have more grammatical sentences with more uniqueness.
In my example I use all the hunger games books to generate unique and seeded quotes.
Check out my Obama Speech Quote Generator to see a awesome example using this project.