Swatch shows the 2-to-2 gather worked as: P2tog, leave on LN; purl the 1st st; slip both sts to RN. Could be used for loose ribbing.
Shown with a cast-on count of 8 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats
Swatch photo uploaded by Emex