Fig. 6. General algorithm of the role game and the model. At each time step (monthly), all agents look for a good place to make crops or to harvest pasture. The agents represent the actors, who may be farmers or herders. At ime step 1 (July, in reality), they look for a good place for the wet season crop, and time step 6, they look for a good place for the dry season crop. At the end of the year, there is a regeneration of the resource.