How do you fishtail your hair?

You separate your hair into two parts, grab a piece of the hair on your left side and bring it arond the front and then under the right hair. Then hold that with the right, and grab a piece of hair from the right side and bring it around then tuck it under the left side hair. keep alternating doing that until you run out of hair.

It's best to try on someone else's hair first, expiriment with it until you can get it right!