My lines could use a little work. I blame coffee! The base is China Glaze Adventure Red-Y. The colors in the braided part are China Glaze Sugar High (pink) and Orly's Dazzle (silver).
This method requires a lot of dry time.
Tip: you can dip your fingers in a bowl of ice water, for a few seconds, to speed the process.
Cheat: You can also just use nail tape. If you don't want to fuss with straight lines. In the above picture, Edgy Valentine Nails, the braid is 100% nail tape.
The possibilities are endless. Peacock Braided Nails, was peacock inspired, but really ended up having more of an Egypt vibe.