code: def stepper_step(self, motor_speed, number_of_steps):
          
          if number_of_steps > 0:
              direction = 1
          else:
              direction = 0
          abs_number_of_steps = abs(number_of_steps)
          data = [self.STEPPER_STEP, motor_speed & 0x7f, (motor_speed >> 7) & 0x7f, (motor_speed >> 14) & 0x7f,
                  abs_number_of_steps & 0x7f, (abs_number_of_steps >> 7) & 0x7f, direction]
          self._command_handler.send_sysex(self._command_handler.STEPPER_DATA, data)
docs: Move a stepper motor for the number of steps at the specified speed
  
          :param motor_speed: 21 bits of data to set motor speed
  
          :param number_of_steps: 14 bits for number of steps & direction
                                  positive is forward, negative is reverse