Start in the middle, between the two layers, leave a tag end about two inches, go through one layer to come out one side, two or three rounds through both layers, end up coming out in the middle between the layers, then continue over to the opposite side, come out one side or the other, go around two or three times through both layers, and end up coming out in the middle between both layers. Take the end of your thread and make a reef knot with the tag you left when you started. The knot will be hidden between the two layers and as long as you tie a good knot will never come undone or be seen. Done with one needle, hope this helps.