First, start our with the standard hemp bracelet/necklace/anklet setup. Four strings, 2 on either side of the inside surrounding two together in the middle. Then, do two square knots.
Add three small beads on each of the outside strings, and one medium sized on the two middle strings.
Then, do two more square knots. There! You are done! Just repeat steps 2-3 until you have your finished product. :)