stt.setParticleList(
createRandomParticles(stt.getSimulationWidth(), stt.getSimulationHeight(),
stt.getSpeedOfLight() / 3, count, radius));
stt.setBoundary(GeneralBoundaryType.Hardwall);
//stt.setParticleSolver(new EulerRichardson());
stt.setParticleSolver(new BorisRelativistic(stt.getSpeedOfLight()));
Simulation simulation = new Simulation(stt);
return simulation;
}