After sewing the top together tie the quilt about every four inches. Then hem the edges. Staple and tack two thin boards to the bottom of the quilt, on either side of the material. You'll need another small board to attach the top of the quilt to your window frame. In addition you need cording such as venetian blind cording.
Regular string tends to unravel and break.
Two small pulleys and several large fencing type staples are also required. And you will need something to wrap your cord around to keep the curtain rolled open. A nail will work but a small dowel is nicer. A little creative adjustment may have to be done to your window frames to make these curtains work well. The pulleys need to hang inside the curtain.