There are multiple ways to make a log cabin block. These are just a few pics....
https://www.bing.com/images/search?q...ages&FORM=IGRE
And this tab was labeled Printable Log Cabin patterns.
https://www.bing.com/images/search?q...rn&FORM=RESTAB
Do you want the center to be a square, or do you want to fussy cut some fabric, or a pieced center, or an offset, curving block? Sounds like I am being sarcastic, but I don't really mean to be. It's just that your simple question doesn't really have a simple answer.