Detailed instructions will help you learn how to knit the Berry in Box Stitch

Cast on: multiple of  6 sts + 1.
Row 1 (RS): P3, * k1, p5; repeat from * to last 4sts, k1, p3
Row 2: K3tog, * yo, (k1, yo, k1) in next stitch, yo, k5tog; repeat from * to last 4sts, yo, (k1, yo, k1) in next stitch, yo, k3tog-tbl.
Row 3: K1, * p5, k1; repeat from * to end.
Row 4: P1, * k5, p1; repeat from * to end.
Row 5: K1, * p5, k1; repeat from * to end.
Row 6: (K1, k1-tbl) in first stitch, * yo, k5tog, yo, (k1, yo, k1) in next stitch ; repeat from * to last 6sts, yo, k5tog, yo, (k1, k1-tbl) in last stitch
Row 7: P3, * k1, p5; repeat from * to last 4sts, k1, p3
Row 8: K3, * p1, k5; repeat from * to last 4sts, p1, k3
Repeat rows 1-8 until you have reached your desired length.

Knitting abbreviations:
Through the back loop: Tbl | Knit: K | Purl: P | Yarn over: Yo
Knit two stitches together: K2tog  |  Knit three stitches together: K3tog
K5tog: K2tog tbl, k3 tog, pass the k2tog tbl  stitch over the k3tog stitch.