Measure the room you want to hang the drape using a tape measure. The area you need to measure includes the distance across the ceiling that you want to cover, the width of the ceiling and the height of the wall.
Cut a piece of tulle fabric using scissors so that it fits the ceiling and down the wall, adding on 6 to 8 feet in length to your measurements. You can find bulk tulle fabric at a large craft store.
Climb a ladder to allow you to reach the center of the ceiling, then apply 4-inch-long foam adhesive strips along the center line.
Repeat to apply a long trail of foam adhesive strips along both edges of the ceiling.
Press the corresponding end of the tulle fabric onto the appropriate wall edge, then press the tulle against the foam adhesive.
Allow the tulle to drape down 3 feet, then press the end of the draped section onto the foam adhesive strips at the center line of the ceiling.
Allow the tulle to drape down another 3 feet, then press the end of the second draped section onto the foam adhesive at the other edge of the wall. Allow the end of the tulle to hang freely down the wall.