Moss Stitch (multiple of 4 sts)
Note: the instructions below are a generic description of how to execute this stitch pattern. For a single repeat, you'd only need four stitches but you'd have a VERY narrow piece! In the example shown, there are eight repeats of the stitch, so to make a swatch that looks like the one shown, you need to cast on 32 stitches (8 x the multiple of 4 stitches needed for a single repeat of the pattern.)
Rows 1 (RS) *K2, p2; rep from * to end.
Rows 2 and 3 *P2, k2; rep from * to end.
Row 4 *K2, p2; rep from * to end.
Rep rows 1-4.
Stitch directions reproduced with permission, from Vogue Knitting Stitchionary: Volume One, Sixth & Spring Books, 2005