@aries_girl first you do it like in the pattern. Then you leave out the middle knots so you have two separate chevrons. Once you have reached the desired length you twist them and start knotting according to the pattern again.
@blem1823 sorry if you'd don't understand but im going to try to explain it. So in the start you make the pattern like how it is shown, until you get to the twisted part, then you have make two regular chevrons with the string that you are using, after that when it gets long enough you have to put one of the chevrons on top of each other, and then continue your bracelet by following the pattern.