Shown with a cast-on count of 9 stitches.  

• Rows 1 and 3 (RS): P4, k1, p4.
• Rows 2 and 4: K4, p1, k4.
• Row 5: P4, 1-to-7 inc, p4 (15 sts).
• Rows 6, 8, and 10: K4, p7, k4.
• Rows 7 and 9: P4, k7, p4.
• Row 11: P4, k2tog, k3, ssk, p4 (13 sts).
• Row 12: K4, p5, k4.
• Row 13: P4, k2tog, k1, ssk, p4 (11 sts).
• Row 14: K4, p3, k4.
• Row 15: P4, sl2-k1-p2sso, p4 (9 sts).
• Rows 16 and 18: K9.
• Row 17: P9.