Blogger blog post auto-expiry date

See more:

DateTime

automation

Hi there,
Does anyone know if there is a third party auto-expire app or piece of code that I could use to add an auto-expire function to my Blogger blog posts?

I want to create an "always on top" for my "Welcome" message on my blogroll summary. I usually make about three posts each week, and I currently repost one of my three recycled "Welcome" posts alongside my new posts.

What I would like to do is to set my "Welcome" message to auto expire as the new one goes up, always keeping one of my "Welcome" messages on top (so I don't have two or three "Welcome" messages showing in my blogroll when I forget to revert to draft).

See what I mean at http://www.samyoung.co.nz/search[^]

Sorry, but I am not tech-savvy, so if you can explain anything very clearly, that would be very much appreciated!

Warmest regards

Sam Young