Shown with a cast-on count of 33 stitches.  

• Rows 1 and 3 (RS): K3, *yo, k2tog, k3, ssk, yo, k3, repeat from *.
• Rows 2 and 4: [K3, p2] twice, *p5, k3, p2, repeat from * to last 3 sts, k3.
• Row 5: K3, *yo, k2tog, k3, ssk, yo, 3-to-3 gather, repeat from * to last 10 sts, yo, k2tog, k3, ssk, yo, k3.
• Rows 6 and 12: K3, purl to last 3 sts, k3.
• Rows 7 and 9: K3, *ssk, yo, k3, yo, k2tog, k3, repeat from *.
• Rows 8 and 10: *K3, p7, repeat from * to last 3 sts, k3.
• Row 11: K3, *ssk, yo, 3-to-3 gather, yo, k2tog, k3, repeat from *.