int motion_amplitude = 1;
Tracker *tracker = new Tracker(nb_time_steps, nb_locations);
for(int l = 0; l < nb_locations; l++) {
for(int k = 0; k < nb_locations; k++) {
int motion_amplitude = 1;
Tracker *tracker = new Tracker(nb_time_steps, nb_locations);
for(int l = 0; l < nb_locations; l++) {
for(int k = 0; k < nb_locations; k++) {