docs: def create_job(cpu_width, time_height):
      """
      :param cpu_width: number of cpus
      :param time_height: amount of time
      :return: the instantiated JobBlock object
      """
  
      shell_command = stress_string.format(cpu_width, time_height)
      job = JobBlock(cpu_width, time_height)
      job.set_job(subprocess.call, shell_command, shell=True)
      return job