Mr. Fibonacci, I presume?

So Mr. Fibonacci is my new hero. Not really, but numbers are quite pretty and I'm now knitting a Fibonacci stripes bag for myself. It's in royal blue and light purple, worsted weight yarn and I'll post the complete pattern here when I'm finished.

Materials
-US 7 Needles
-Worsted Weight Yarn (I used Red Heart SuperSaver Acrylic) in 2 Colors - MC and CC
-4.0mm Crochet Hook
-Tapestry Thread
-Lining for Inside of Bag

Abbreviations
CO: Cast On
St st: stockinette stitch
MC: main color
CC: contrasting color

CO 48 stitches in MC.
*St st 2 rows.
Change to CC.
St st 3 rows.
MC st st 5 rows.
CC st st 2 rows.
MC st st 3 rows.
CC st st 5 rows.
Repeat from * until bag is desired length. For my bag, I repeated the pattern 3 times.
For the last time you're doing the CC stockinette stitch, do only three rows, bind off on the fourth row. Bind off loosely in pattern. Repeat.
This will be the outside of your Fibanocci bag.

For lining the bag, you will need two pieces of fabric. I like to use cotton. Wash the cotton according to the machine instructions and you'll sew the fabric onto the inside of the bag. Make sure the Vs on the stockinette stitch are pointing towards the outside.