Shown with a cast-on count of 30 stitches.  

• Row 1 (RS): P1, k6, p2, k4, p4, k4, p2, k6, p1.
• Rows 2 and 20: K1, p6, k2, p4, k4, p4, k2, p6, k1.
• Row 3: P1, k6, p2, 2/2 RPC, p4, 2/2 LPC, p2, k6, p1.
• Rows 4 and 18: K1, p6, k2, p2, k8, p2, k2, p6, k1.
• Row 5: P1, 3/3 LC, 2/2 RPC, p8, 2/2 LPC, 3/3 RC, p1.
• Rows 6, 8, 10, 12, 14, and 16: K1, p8, k12, p8, k1.
• Row 7: P1, k4, 2/2 RC, p12, 2/2 LC, k4, p1.
• Rows 9 and 13: K1, 3/3 LC, k2, p12, k2, 3/3 RC, k1.
• Row 11: P1, k8, p12, k8, p1.
• Row 15: P1, k4, 2/2 LC, p12, 2/2 RC, k4, p1.
• Row 17: P1, 3/3 LC, 2/2 LPC, p8, 2/2 RPC, 3/3 RC, p1.
• Row 19: P1, k6, p2, 2/2 LC, p4, 2/2 RC, p2, k6, p1.