Okay, first off you start by sewing the legs together to make little tubes. For the hood part, each pattern piece is half of the hood. First start by sewing each V shape together to make the rounded dish shape. After you have 4 little dish shapes, pair them off. Sew them together so that the V shape seam meets in the middle, stop at the round edges. (It will look like an X in the middle of each hood piece) Now you have 4 leg tubes, and two hoods. The goal of this next step is to pretty much make two hoodies. Why two? One will serve as the lining and the other will be the outside piece. For each hoodie, sew the leg/arm pieces so that the shoulder (NOT THE SEAM) is facing towards the middle of the coat (The shoulder is the hump-looking part). After you have sewn on the arms, line up the middle seam of your hood to the indent of the body of the jacket. Sew the hood to the jacket. Repeat the process with the other pieces. Now that you have two halves of a hoodie, line them up with their seams facing outward and the smooth parts in between each other. This ensures that when you flip the jacket inside out, you won't have seams poking everywhere. Sew the hoods together, and sew the bottom of the jacket. If you want to incorporate a zipper, DO NOT sew the sides. If you don't want a zipper, sew the sides, but leave about a two inch hole on one of the sides. Flip the hoodie inside out and sew up the small hole. If you have left the sides undone for a zipper, fold in the side pieces of fabric around the fabric on the zipper and carefully sew it together. The ends of the arms are done in a similar fashion. Fold the fabric in on itself and sew it together. And the reversible hoodie is done!