The stitch I used is similar to a stitch I saw on a friends baby blanket. The stitch looks like the crosshatch stitch, or diagonal box stitch, though I did mine differently. I just went from memory of what the stitch looked like and came up with a way to duplicate it.
Here is a close up of the stitch:
This was a lot of fun to make. I hope you enjoy it too!
Worsted weight yarn. (4 skeins of Aurora Borealis and 1 skein of solid complementing color)