By utilizing slipped stitches, this pattern is a great if your a beginner with color work.

With color A, cast on a multiple of 4 stitches + 3 and knit one row.
Row 1 (RS): With color B, k1, * sl 1 wyib, k3, repeat from * last 2 sts, sl 1 wyib, k1.
Row 2: With color B, k1, * sl 1 wyif, k3, repeat from * to last 2 sts, sl 1 wyif, k1.
Row 3: As row 1.
Row 4: As row 2.
Row 5: With color A, k3, * sl 1 wyib, k3; repeat from * to end..
Row 6: With color A, k3, * sl 1 wyif, k3; repeat from * to end.
Row 7: As row 5.
Row 8: As row 6.
Repeat rows 1-8 till necessary for completing your project.