Now you'll start tying the alternate half-hitches by taking the working
ends of the paracord, start with the left piece. Take the left cord
under the two center cords and then back thru the loop of the left cord
Now take the right side cord going under the two center
cords and back thru the right loop and tighten. Again with the left,
under the two center cords and back thru the left loop, etc.. continuing
alternating the left and right cords.