Temporal evolution of the fluid elements and the magnetic field lines after the perturbation. The orange diamonds denote the positions of the fluid elements, and the blue circles correspond to the locations of the center of each dip. The purple arrows denote the velocity field. Dotted lines are unperturbed magnetic field lines; solid lines are actual magnetic field lines at a given moment. We note that the magnetic field perturbation is multiplied by a factor of ten for better visibility.