Video 1. Particle motion on a torus. Made with Python by JFGH.

Vídeo 2. Particle motion on a torus. Frame (v,B,F). Made with  Python by JFGH.

Vídeo 3. Particle motion of a torus (background black). Frame (v,B,F). Made with Python by JFGH.

Vídeo 4. A simpler model made in simple Python. Credits to JFGH.