  Computer simulations of plasmas are relevant nowadays, because it helps us
understand physical processes taking place in the sun and other stellar
objects. We developed a program called PCell which is intended for displaying
the evolution of the magnetic field in a 2D convective plasma cell with perfect
conducting walls for different stationary plasma velocity fields. Applications
of this program are presented. This software works interactively with the mouse
and the users can create their own movies in MPEG format. The programs were
written in Fortran and C. There are two versions of the program (GNUPLOT and
OpenGL). GNUPLOT and OpenGL are used to display the simulation.
