public static double processValueHouse(ValueHouse valueHouse) {
        Random gen = new Random();
        long timeStart = System.currentTimeMillis();
        while (!valueHouse.canBeLifted()) {
            //Random balloon volume 3..4mm^3
            double balloonVolume = gen.nextDouble()%0.001 + 0.007;
            valueHouse.addBalloon(balloonVolume);
        }
        long timeFinish = System.currentTimeMillis();
        long execTime = timeFinish - timeStart;
        return execTime;
    }