To crochet this stitch pattern as pictured, you'll need two colors of yarn or crochet thread, colors A and B. In my sample swatch, color A is called "Bone" and color B is called "Autumn Red." These are both colors of Caron's Simply Soft, which is a worsted weight acrylic yarn.
Abbreviations Used in This Pattern:
Spike Stitch: In this pattern, a spike stitch is defined as being a single crochet stitch that is worked into the row below where you'd ordinarily work it.
How to Change Colors: The linked tutorial shows you how to change colors, step by step. You'll want to do your color changes before completing the last step of the last stitch at the end of the specified row.
This stitch is a multiple of 4.
Work 1 ch st between each row as a turning chain.
Crochet your foundation chain using color A.
Rows 1-2: Single crochet across entire row. At the end of the second row, change colors to color B.
Row 3: [1 sc in ea of the next 3 sc sts. Work 1 spike stitch in the next sc.] Rep the sequence in brackets all the way across the row. When you get to the end of the row, work 1 sc in ea of the last 3 sts. At the end of the row, change to color A.
Rows 4-5: Single crochet. At the end of row 5, change to color B.
Row 6: sc in 1st st. [Spike stitch in next st, then work 1 sc in ea of the next 3 sts.] Rep sequence in brackets all the way across the row. sc in the last st in the row. At the end of the row, change to color A.
Rep rows 1-6 until the piece is the length you want it to be.