The Green and White Fluted Rib Scarf

I got a lot done over winter break. My second project after the hats was this green and white fluted rib scarf. Doesn't it have a nice pattern? It's the same two rows, alternating between white and green. 

I found it on Ravelry, of course.

Here's the pattern that produced this coloring:

Cast on 21 stitches.
Following the pattern, work 12 rows in white.
Switch to green, work 2 rows.
Switch back to white, bringing the yarn up the side. Work two rows.
Switch back and forth between green and white until the scarf is long enough. Mine hit six feet before I stopped.
Work 12 rows in white.
Bind off.