Create a grid of pencil dots on the top layer of the comforter. Space the dots every six inches.
Thread the needle and insert it into the first pencil mark. Bring the needle and thread through all layers of the comforter, leaving a 4-inch tail of thread at the end.
Bring the needle and thread back up through all the layers of the fabric, staying on the pencil dot. Cut the thread, leaving another 4-inch tail of thread.
Tie the 4-inch thread tails together tightly and repeat the same process for all of the pencil dots on the comforter.