Index of /utilities/cgi/dynamic-images

      Name                    Last modified      Size  Description
      Parent Directory                             -   
      counter.gif             2013-10-04 09:09   73K  
      interrupted-counter.cgi 2014-03-05 14:59  355   
      second-dim.cgi          2014-01-16 14:31  254   
      slow-second-dim.cgi     2014-02-24 15:19  264   

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.