Algorithmic composition can be done as a live performance using live coding tools. An example approach to such performances is described. Using the Conductive library for the Haskell programming language in conjunction with some external tools, samples are triggered according to interonset interval patterns generated at a variety of densities. Automatic movement through those density levels is accomplished through a specialized data structure, which is also used to time-vary other parameter values. The performer manages the state of the above items, and audio is finally output through effects.