Shown with a cast-on count of 21 stitches.  

• Rows 1 and 9 (RS): P3, *k6, p3, repeat from *.
• Rows 2, 6, and 10: K3, *p6, k3, repeat from *.
• Rows 3 and 7: P3, *k1, k2tog, yo, ssk, k1, p3, repeat from * (multiple of 8 sts, plus 3).
• Rows 4 and 8: K3, *p2, pfb, p2, k3, repeat from * (multiple of 9 sts, plus 3).
• Row 5: P3, *k2tog, yo, k2, yo, ssk, p3, repeat from *.
• Repeat rows 1-8.