Shown with a cast-on count of 26 stitches.  

• Row 1 (RS): Knit.
• Rows 2, 4, 6, 8, and 10: Purl.
• Row 3: *K2, sl1-k2tog-psso, 3-to-9 gather, k3tog, k2, repeat from * (multiple of 15 sts).
• Row 5: *Ssk, k1, k3, yo, k3, yo, k3, k1, k2tog, repeat from *.
• Row 7: *K2, sl1-k2tog-psso, yo, k1, yo, k3, yo, k1, yo, k3tog, k2, repeat from *.
• Row 9: *K2, k2, ssk, yo, sl2-k1-p2sso, yo, k2tog, k2, k2, repeat from * (multiple of 13 sts).