Cat Bordhi How Do I Knit The Rim Of A Trifold Mobius?

How do I knit the rim of a trifold mobius? - cat bordhi

I try to follow the instructions on Bordhi Cat "Magical Knitting A Second Treasury triptychs Mobius. The instructions that I will create half the rim with 3, wildcard, * Knit 1 round, p 1 round, repeat from * twice, 1 is the last round. Seems simple. Now the question. Upon completion of this should be 7 rows, is woven or garter stitch? Mine is elastic, the photo in the book appear in the league. Help!