Shown with a cast-on count of 21 stitches.  

• Rows 1 and 5 (RS): Knit.
• Row 2: K1, *k3tog, k3, repeat from * to last 2 sts, k2 (multiple of 4 sts, plus 3).
• Row 3: K5, *yo, yo, k4, repeat from * to last 2 sts, yo, yo, k2 (multiple of 6 sts, plus 9).
• Rows 4 and 8: Knit.
• Row 6: K4, *k3tog, k3, repeat from * to last 5 sts, k3tog, k2 (multiple of 4 sts, plus 7).
• Row 7: K2, *yo, yo, k4, repeat from * to last st, k1 (multiple of 6 sts, plus 3).
• Repeat rows 1-8.