In Jenny's tutorial, she said that one printed layer cake and one solid layer cake would make a queen size chevron quilt. How many blocks across and down?

I love Jenny's tutorials - she makes everything look so easy. However, I'm having a difficult time understanding the Jelly Roll Quilt Race. I get how to attach the strips, cut off 18 inches, then bring up the bottom and sew one long seam, making 2 rows. My question is, what do you do afterwards? The tutorial is SO fast, I can't see what comes after the first two rows! Are there any written directions out there?

Thanks so much from a newbie quilter!!

Karen Knisley
Circleville, OH