Summarize the following:
Pull the left bottom corner up so that side edge is perfectly even with the top of the bill. It will make a diagonal crease along the bottom left of the bill. Do the same with the right side. Your bill should now have a flat edge along the top. On the bottom, it should be a diagonal fold going down towards the middle, a short straight edge in the middle, and a diagonal fold going back up to the right side. Fold the bottom edge up just a little bit, less than 0.25 inches (6.4 mm). Flip it over and fold the edge up the same amount as you did on the other side. You're basically creating a fan-style fold, moving from the bottom of the bill to the top. Continue folding until you've done the whole bill. You should have a thin strip of bill that you've folded back and forth. Because you started with a short side and moved to the longer side when doing your accordion fold, one side will be longer than the other. Place the longest side of the accordion fold face up. Bring the 2 ends of the fold up to meet each other, creasing the bill in the middle as you do. As you fold this step, the bottom of the bill should start to fan out like a leaf. When you bring the 2 ends together, you're creating the middle of the leaf. When you look at the 2 edges at the center of the leaf, both should be 2 layers thick. Pick the side that's slightly longer than the other, and open the layers with your finger. Slip the other edge between those 2 layers. The longer edge should go over the first crease in the smaller edge, holding it in place. Your leaf is complete and ready to stick on a money tree!

Summary:
Turn the bill back-side up and fold the corners up to the top edge. Begin folding the bill accordion-style, starting from the bottom edge. Fold the ends of the bill together. Close the leaf by bringing one edge over the other.