You'll need three colors of thread, a clipboard and scissors
Cut two 16in strands of each color and tie them together. Make sure the two color strands are next to each other
Clip it under a clipboard on close a drawer on it so it stays
Separate your yarn by color
Act as if the two strands of same color are one strand, so take the 'first'strand and knot it around the second strand, TWICE. Tie the first around the third one TWICE as well.
Soon enough it should look like this
And then when you get enough to cover the top of your wrist, you are done!