Shown with a cast-on count of 9 stitches.  

• Row 1 (RS): *K1, yo, k2, yo, k1, repeat from * to last st, k1 (multiple of 6 sts, plus 1).
• Rows 2 and 4: Purl.
• Row 3: *K2, yo, k2, k2tog, repeat from * to last st, k1.
• Row 5: *K1, k2tog, k1, yo, k2tog, repeat from * to last st, k1 (multiple of 5 sts, plus 1).
• Row 6: P1, *p2, p2tog, p1, repeat from * (multiple of 4 sts, plus 1).