Oscillators
By mixing stable and volatile artifacts, many investigators produced a huge variety of long period oscillators; some of them were capable of creating gliders when placed in close proximity so that non-essential debris in their cycles could interact. The culmination of this effort was a remarkable series of constructions and constructors.
Figure: An oscillator of period 30.
Harold V. McIntosh
E-mail:mcintosh@servidor.unam.mx