Cast on 45 stitches in Purple.
Work 10 rows in ribbing (k1, p1).

* Knit 2 rows in Purple (MC).
Knit 2 rows in Black (CC).
Knit 4 rows in MC.
Knit 2 rows in CC. **
Knit 2 rows in MC, 2 rows in CC, 4 rows in MC, 4 rows in CC.
Repeat from * to **
Knit 4 rows in MC, 2 rows in CC.
Repeat from * to **
Knit 2 rows in MC.
Knit 2 rows in CC.

Knitting the thumb hole. (I don't made a photo while knitting, so i knitted the sample)

Left mitten:
Knit 13 sts in CC.
Take off the following 9 sts from left needle and put them to a safety pin.
Cast on 9 stitches at right needle in CC.
Knit the remaining 23 stitches in CC.
Next, knit 1 row in CC.

Right mitten:
Knit 23 sts in CC.
Take off the following 9 sts from left needle and put them to a safety pin.
Cast on 9 stitches at right needle in CC.
Knit the remaining 13 stitches in CC.
Next, knit 1 row in CC.

Continue knitting:
Repeat from * to **
Knit 2 rows in MC.
Knit 2 rows in CC. (I knitted 1 row because black yarn was a little)
Work 8 rows in (k1, p1) ribbing in CC.
Bind off.

Knitting a thumb:
Take off the stitches from safety pin and put them to first needle. Pass the second needle through the other 9 sts. Knit round with third needle.
Make 10 round rows.
Bind off.
(If you get a hole near the thumb, just sew it!)

Fold mitten in half lengthwise and sew with a needle or crochet from the inside.