Trinity Textured Pattern

Pattern
Cast on a multiple of 4 sts, plus 2.
Row 1 (RS): Purl.
Row 2 (WS):  Knit 1, *(Knit 1, Purl 1, Knit 1) into next stitch, P3tog; rep from * to last st, Knit 1.
Row 3: Purl.
Row 4: Knit 1, *P3tog, (Knit 1, Purl 1, Knit 1) into next stitch; rep from * to last st, Knit 1.
Rep Rows 1-4.