Verigated thread really adds to it I think, but doing an all over stipple is probably the best, or you can stipple in sections like all the white done in a varigated, and the blue done in another var, thread(say blues from light to dark), and purple strips done in a var, purple. that would be really cute, or you could do a wondering vine. There are a million ways to do it. Just remember to breath and relax and enjoy. Best of luck, have fun.