BEAM - Biological Electronic Aesthetic Mechanical Robotics
It is based on the work of Mark Tilden, using Nervous network
circuits to design robust, life like robots.
Principles of biology are used for better mechanical designs
as well as, for understanding models of thought.
What circuit are you working from? From memory, you should have a 1kohm resistor and an LED in series across the power rails. +ve rail -> 1kohm -> ordinary LED