Shown with a cast-on count of 11 stitches.  

• Rows 1 and 9 (RS): K3, *[yo, k2] twice, repeat from * (multiple of 6 sts, plus 3).
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: *[K1, k2tog] twice, repeat from * to last 3 sts, k3 (multiple of 4 sts, plus 3).
• Row 5: *K2, k2tog, yo, repeat from * to last 3 sts, k3.
• Row 7: K3, *[yo, k2tog] twice, repeat from *.
• Row 11: *[K1, ssk] twice, repeat from * to last 3 sts, k3 (multiple of 4 sts, plus 3).
• Row 13: *K2, ssk, yo, repeat from * to last 3 sts, k3.
• Row 15: K3, *[yo, ssk] twice, repeat from *.