A team of USHMM exhibitions specialists built many iterations and experimented with materials and technology. During this iterative process, the design evolved several times; strands of LED lights replaced the original proposed fiber-optic cables. Rather than each strand representing an individual or group of individuals, the lines of LEDs on each strand move up or down with population change. The outline of the ghetto streets was added to the design, creating a backlit focal point on the ceiling from which the light strands are suspended. A timeline projection and water droplet animation were added to the floor beneath the installation.
