Index of /utilities/cgi/dynamic-images

      Name                    Last modified      Size  Description
Parent Directory - counter.gif 04-Oct-2013 09:09 73K interrupted-counter.cgi 05-Mar-2014 14:59 355 slow-second-dim.cgi 24-Feb-2014 15:19 264 second-dim.cgi 16-Jan-2014 14:31 254
The two scripts second-dim.cgi and slow-second-dig.cgi return a navy
PNG image that is one pixel high and as many pixels wide as this
server's system time's seconds field. The slow-* variant takes three
seconds to respond.

The counter.gif image comes from:
   http://commons.wikimedia.org/wiki/File:Seven_segment_display-animated.gif
It has 16 frames and takes 24 seconds to play.