Rib and Welt in the round

Pattern
Cast on a multiple of 8 sts.
Rounds 1-2: *Knit 1, Purl 1, Knit 1, Purl 5; rep  from * to end.
Rounds 3-4: *Knit 1, Purl 1, Knit 5, Purl 1; rep  from * to end.
Rounds 5-6: *Knit 1, Purl 5, Knit 1, Purl 1; rep  from * to end.
Rounds 7-8: *Knit 5, Purl 1, Knit 1, Purl 1; rep  from * to end.
Rounds 9-10: *Purl 4, Knit 1, Purl 1, Knit 1, Purl 1; rep  from * to end.
Rounds 11-12: *Knit 3, Purl 1, Knit 1, Purl 1, Knit 2; rep  from * to end.
Rounds 13-14: *Purl 2, Knit 1, Purl 1, Knit 1, Purl 3; rep  from * to end.
Rounds 15-16: *Knit 1, Purl 1, Knit 1, Purl 1, Knit 4; rep  from * to end.
Rep Rounds 1 – 16.