def main():
if len(sys.argv) < 2:
terminate_with_usage()
n_particles = parse_number(sys.argv[1])
if n_particles <= 0:
terminate_with_usage()
try:
particle_system = ParticleSystem(n_particles)
particle_system.loop()
except IOError as e:
print(Style.BRIGHT + Fore.RED + 'I/O Error: ' + Style.RESET_ALL +
Fore.RESET + str(e))
except ParticleSystemException as e:
print(Style.BRIGHT + Fore.RED + 'ParticleSystemException: ' +
Style.RESET_ALL + Fore.RESET + str(e))
