CO 12 STS
Row 1 (WS): K2, P8, K2
Row 2 (RS): P2, K2, P4, K2, P2
Row 3 (WS): K2, P8, K2
Row 4 (RS): P2, K2, P4, K2, P2
Row 5 (WS): K2, P8, K2
Row 6 (RS): P2, K2, P4, K2, P2
Row 7 (WS): K2, P8, K2
Row 8 (RS): P2, K2, P4, K2, P2
Row 9 (WS): K2, P8, K2
Row 10 (RS): P2, C4F, C4B, P2
Repeat rows 1 – 10 until desired length.