So I have a noob question. Lets say I have a 15 x 15 room. I am going to install 12' carpet. If I order 12' x 19' carpet how can I cut the carpet and seam it and have the pile go in the same direction? If the pile direction is up in the 19' direction then it will be either left or right if I cut off a piece and seam it? Right? Do I need 2 pieces of 12' x 16'?