complex stitches made up of smaller parts. Try sewing a decorative stitch withe the zigzag machine, then further embellishing with hand embroidery. I may have to try this some daywhen I get really adventurous-hope I can learn to do these stitches.
"Double Back Stitch" -- This may be the same stitch that was used on the items that I pinned made in Mexico in the "traditional Mazahua" style or method. (This looks like it might be more complicated and more dense though.