Corrugated Rib Help

:eyes:I am getting ready to go to Meg Swansen’s Knitter’s Workshop in September and am trying to learn the Corrugated Rib. I am getting my stitches tangled and it does not look like Ribbing. I am confusing myself- ANY HINTS?

How’s the pattern stitch written?

It’s important to bring the yarns to the back after you use them. That happens automatically with the knits, but you bring the purl yarn forward, purl those, and then bring that to the back before you switch to the knit colors.