Target Curves for Pick-up, Carry, and Drop Mobile Automata
Mobile automata repeatedly sense a grid cell (or neighborhood of cells), perform an action, and then move to a new cell. We explain how to modify mobile automata that pick-up items they encounter while performing random walks and carry them to distant cells to drop in such a way that they are arranged along the circumferences of circles, so that other target curves besides circles can be specified. We apply this technique to the composition of algorithmic designs.
 Greenfield, G., Stigmmetry prints from patterns of circles, Bridges 2012 Conference Proceedings, (eds. R. Bosch, D. McKenna and R. Sarhangi), 2012, 291–298.
 Urbano, P., The T. albipennis sand painting artists, Applications of Evolutionary Computation, Springer- Verlag Lecture Notes in Computer Science, LNCS 6625, 2011, 414–423.