Shown with a cast-on count of 30 stitches.  

• Row 1 (RS): *Ssk, k11, k2tog, repeat from * (multiple of 13 sts).
• Rows 2, 4, and 6: Purl.
• Row 3: *Ssk, k9, k2tog, repeat from * (multiple of 11 sts).
• Row 5: *Ssk, k7, k2tog, repeat from * (multiple of 9 sts).
• Row 7: *Ssk, yo, [k1, yo] 5 times, k2tog, repeat from * (multiple of 13 sts).
• Row 8: *P1, yo, k11, yo, p1, repeat from * (multiple of 15 sts).