This 6 by 6 display has 3 groups of flashing lights. This is one version of this display, and the one I built many years ago. At some point the light pairings changed which gave the display a different look. I don't know if this was by design, or if the timer motor was removed for repair and then just mis-wired when replaced.
This is the Library Computer display. It continuously cycles the same repeating pattern. It was sometimes "sped-up" to indicate computer activity.
This is the “Science Scanner” as seen early on in the series as it is in the best condition during the first few episodes. It consists of 2 identical radial spoke patterns attached to glass, one on top of the other. They are offset slightly from the center of rotation. The rotating pattern spins CW about 2 RPM. As the patterns continuously come into and out of alignment, they create an interference pattern, or moire (pronounced "mwah-ray") that can be seen as the expanding and contracting “spider”. The same pattern was used on the hero communicators with slight modifications.
This file is very graphic intensive and a fast PC is needed to show this correctly. If you use Ctrl+ or Ctrl-, you can find the size that will best run on your computer.