I'm working on and just about ready to assemble another gift afghan. (A bit worried that I'll run out of the dark brown yarn but we'll have to wait and see!)
Video for pattern technique is here (click).
and here's the PDF (click).
Here's a very rough photoshop of what I believe the finished version might look like, will post an update when I get it all sewn together:
The pattern possibilities are almost endless.
Unfortunately I ran out of the dark brown near the end so had to improvise. Here's the finished project:
I also like this similar idea that I crocheted about a year ago using cascading granny squares and the Redheart Tiles Granny Afghan pattern.