Have a Happy New Year.
You are thinking of the reversible stitch. If you look the stitch up it will refresh your memory on how to do it. Then all you do is make your chain the length you want the blanket to be wide and then work to the desired size. The reversible stitch really is the "pattern" that you use. I would suggest making a potholder size out of old yarn for practice before starting your blanket so you are comfortable doing it.
Copyright (C) 2012 Interweave Press, LLCUse of this site signifies your agreement to the Terms and Privacy Policy, updated March 2007