The Dip-Stitch Check is easy and fun to work. All you need to know is the knit, purl and dip stitches.
How to knit the Dip stitch: Insert needle into front of stitch 3 rows below next stitch, knit an extra stitch in this stitch; then knit the next stitch on the left-hand needle and pass the extra stitch over it.
With color A, cast on a multiple of 4, +3 sts.
Row 1 - Wrong side: With color A, purl all sts.
Row 2 - Right side: With color A, knit all sts.
Row 3: With color A, purl all sts.
Row 4: With color B, knit 3, * dip stitch, knit 3; repeat from * to end.
Row 5: With color B, purl all sts.
Row 6: With color B, knit all sts.
Row 7: With color B, purl all sts
Row 8: With color A, knit  1, * dip stitch, knit 3; repeat from * to last 2 sts, dip stitch, knit 1.
Repeat rows 1 to 8.