Well, your question is a very broad question. Not knowing anything about your setup, all I can do is give a general response. If you want something more specific, it'd be best to include that when asking the monks for help.

Again, I have to be very broad here. I don't know if you're pulling from a database, or a text file, or what. If I were to pull from a database, I'd be using indexes and limits. I would run an SQL query such as this:

SELECT Title, Entry, Author FROM GBook ORDER BY SubDate LIMIT 0, 10

In such a case, that means we're selecting 10 records starting at record #1 (I could have those numbers reversed). Then all I would have to do is keep track of what number to start on, and you can generate the previous/next based on that.

Anyhow, making each row a different color is also a matter of keeping track of what's going on. You might want to have a test to check what row its on. Even rows should get printed in one color, odd rows in another.