Sigma - Sigma - Sigma Rug

I designed this rug as a present for my baby sister. She is no longer a baby, she will be 19 next month (gasp). She is turning into an awesome lady. This fall she starts her second year in college and will be living in a sorority house. Last year she became a proud member of the Sigma Sigma Sigma, or Tri-Sigs as they are called.
So here it is:

I originally thought I would make it all hot pink with purple letters, but I quickly realized that I didn't have enough hot pink material and didn't want to go buy more, so I went with hot pink, light pink, and white.
The entire rug is made up of double crochets. I drew a graph of the sigmas before I started.
It looked like this:

I started at the left side of the graph and worked my way across.  The rug was 36 double crochets across, I started by chaining 38 and double crocheting in 4th chain from the hook. (chain 3 counts as a double crochet. Double crochet across and chain 3 and turn for each row.

 For the first Sigma, I carried some of the colors across, but I realized that didn't look quite as neat as it should. Carrying colors with yarn works out pretty well, but carrying colors with material does not.  So for the next two Sigmas, I changed colors each time. I didn't link all my material into a roll before I started like I usually do, I just worked from a bag of strips, that way I could cut off and link in a new color whenever I needed one, which I realize is a lot of work when you get to the middle and you have to switch after one single stitch, but it looks so much smoother.

 After finishing all 32 rows, my finished rug measured 19 inches across and 27 inches long (not including fringe).
I tied some purple fringe on the ends of mine (per my sister's request), and that really made it adorable.
So since this project worked out so well, I am now wondering what other designs I could crochet into a rug. The possibilities are endless!