CO in multiples of 6 (24, 30, 36, etc.)
Row 1: P2 *K2, P4* K2, P2
Row 2: P2 *K2, P4* K2, P2 (same as row 1)
Row 3: P1 *CR, CL, P2* CR, CL, P1
Row 4: P1 *K1, P2* K1, P1
Row 5: *CR, P2, CL*
Row 6: K1, P4 *K2, P4* K1
Row 7: K1 *P4, K2* P4, K1
Row 8: K1, P4 *K2, P4* K1 (same as row 6)
Row 9: *CL, P2, CR*
Row 10: P1 *K1, P2* K1, P1 (same as row 4)
Row 11: P1 *CL, CR, P2* CL, CR, P1
Row 12: P2 *K2, P4* K2, P2 (same as row 1)
Repeat rows 1-12, until desired length