Welcome from New Hampshire
I've made several Attic Windows - it's a very visually pleasing quilt.
The pictures of the first 2 that you show are a much easier way than mine. If I do anymore will follow those.
I just tried writing instructions using your 6" window and they got so complicated that even I couldn't understand them
Check one of the pattern sites, for instance:
http://www.quilterscache.com and you'll find instructions
To see other instructions google "free quilt block attic window" remember to use the "s