Make the next set of increase stitches in the ch1-sp. Double Crochet: Yarn over hook ... what looks like a large square with a split in one side and a square hole in the center.

Row 1: Double ... stitch around, join with ss in top of ch 2. Row 5: 3 hdc in first stitch. Skip next stitch, single crochet (sc) in next stitch. Skip next stitch, 3 hdc in next, continue in this ...