Number of stitches: any number
Row 1: *K1, P1; repeat from * to end of row.
Row 2: Work all stitches as you see them (=K knitted sts & P purled sts)
Row 3: *P1, K1 (=purl knitted sts & knit purled sts); repeat from * to end
Row 4: same as row 2.
Repeat rows 1 to 4
Row 2: Work all stitches as you see them (=K knitted sts & P purled sts)
Row 3: *P1, K1 (=purl knitted sts & knit purled sts); repeat from * to end
Row 4: same as row 2.
Repeat rows 1 to 4