I love all the pictures and I would just keep making your log cabin blocks and either add another row each direction or add a border or two to make it the size you want it to be. Next time try a regular log cabin pattern. Lots of books out there. I have been quilting for 43-44 yr.s and still mess up, always a way to correct a mistake or can always add something to it. Just keep trying. Whatever you come up with will be beautiful. :D :D :D