First thing to know is there is only one find of knot in this bracelet: the forward knot.
You start by taking the string you want to be first (any string works) and pull it slightly to the left and fold over the other strings.
Look's like this:(picture 1)
Tuck the end of the string under and through the fold you just made.It should look like this:(picture 2)
Do 2 forward knots using the blue string on the red string.