The predator is diffusing in the space according to the mechanism described in the text. It approach the prey if find it in its sensing region. Movies are presented in 15 frames per second and any frame snap shots the system after 200 steps. The predator is simply represented by a solid triangle.
Mehran Ebrahimian, Mohammad Reza Ejtehadi

Movie_s1 (In Movie_s1 the prey only feels a two body repulsive hard core potential and tries to escape predator.)

Movie_s2 (In Movie_s2 the prey is helped to escape in lateral routes to demonstrate the chasing ability of the predator.)