Shown with a cast-on count of 15 stitches.  

• Row 1 (RS): K15.
• Row 2: P7, k8.
• Row 3: P6, p2tog, k1, yo, k1, yo, k1, M1L, k4 (17 sts).
• Row 4: P4, k1, p5, k7.
• Row 5: P5, p2tog, k2, yo, k1, yo, k2, pfb, 2/2 RC (19 sts).
• Row 6: P4, k2, p7, k6.
• Row 7: P4, p2tog, k4, yo, k1, yo, k2, pfb, p1, k4 (21 sts).
• Row 8: P4, k3, p9, k5.
• Row 9: P3, p2tog, k6, yo, k1, yo, k2, pfb, MB, p1, 2/2 RC (23 sts).
• Row 10: P4, k4, p11, k4.
• Row 11: P2, p2tog, ssk, k7, k2tog, pfb, MB, p2, k4 (21 sts).
• Row 12: P4, k5, p9, k3.
• Row 13: P1, p2tog, ssk, k5, k2tog, pfb, MB, p3, 2/2 RC (19 sts).
• Row 14: P4, k6, p7, k2.
• Row 15: P2, ssk, k3, k2tog, pfb, MB, p4, k4 (18 sts).
• Row 16: P4, k7, p5, k2.
• Row 17: P2, ssk, k1, k2tog, pfb, MB, p5, 2/2 RC (17 sts).
• Row 18: P4, k8, p3, k2.
• Row 19: P2, k3tog, p1, MB, p6, k4 (15 sts).
• Repeat rows 2-19.