swim_action
swim_action(base, MOTOR_ON);
swim_action(base, MOTOR_OFF);
swim_action(base, EJECT);
swim_action(base, STEP);
swim_action(base, SEEK_NEGATIVE);
swim_action(base, SEEK_NEGATIVE);
swim_action(base, SEEK_POSITIVE);
swim_action(base, SETMFM);