Peter Michelson wrote:

First question: can I use more than one stage of the
LED sequencer to prolong the duration of an LED being on?
For example, if I want the first LED to stay on twice as
long as the 2nd and 3rd LEDs, is it sufficient to connect
the first two outputs to the first LED, and then only one
output to each of the other two? In other words, is it a
problem to connect two outputs together without using diodes?


Yes, it is a problem, you need diodes. See my traffic light
circuit for an example:

http://ourworld.compuserve.com/homep...tm#traffic.gif

-Bill