Brush out any tangles. Take a large section of hair from the left part of your head to make a loop on one side of your hair. Take a section from the other side and put it under the loop.
Pull this section of hair under the other one, keeping it tight
Roll this section of hair under the first one, pulling it through the loop as shown.
Tuck the end of the hair under the section of hair on the right.
Bring the hair back up and over the right-hand section of hair and pull the hair through the loop. Find the bottom of the loop and pull the two ends to fix the knot.