You select the number of travels and the parameters of both the waiting time distribution and jump distance distribution. You also select whether a Gamma distribution or a Lévy distribution is used. The Demonstration shows the probability density function (PDF) of the resulting distribution in a blue frame. You also select whether travelers within a user-selectable proximity of each other are shown as linked by a line. This control permits you to visualize circumstances under which there might be an interchange among travelers, such as the exchange of an idea or a disease. Finally you select the animation rate, which is calibrated to represent a certain number of days per second. The Demonstration models one year of behavior.