The main charter of this work is the organism Physarum polycephalum, in particular plasmodium, Physarum's vegetative phase. During this latter form, the organism is more active and moves searching for food. Plasmodium behaves like a giant amoeba, and more interestingly, its way of foraging can be interpreted as a computation. By comparing the reaction of this organism with attractors and repellents, knowing its capability of solving computational problems with natural parallelism, we dedicated the present work to study the behavior of Physarum polycephalum slime mold under different conditions.