燃油箱的加油量与燃油的当前状态成比例

Question

我想复制汽车油箱，该油箱将显示当前的百分比含量，同时加油量将与油箱中的油量成比例地减少。如果燃油下降到一定量，可能会改变背景颜色。有任何想法吗？我正在学习，并且开始放弃。从昨天开始，我一直在为此奋斗。

必要的班级字段

public class Car extends Vehicle {

    private double fuel;
    private final double fuelCapacity = 54;
    private double fuelUsage = 7.4;
    private double carMileage = 0.000;
    private double distancePerSec;
    private double fuelPerSec;
    private final int carMaxSpeed = 215;
    private double currentCarSpeed;

    public void fuelUsagePerSecond() throws InterruptedException {
        if (getStatus() == MOVING && fuel > 0) {
            fuelUsage = fuelUsage + (getCurrentCarSpeed() / 25);
            fuelPerSec = fuelUsage / 3600;
            fuel = fuel - fuelPerSec;
        }
        else if (fuel <= 0){
            Car.super.stop();
            fuel = 0;
        }
    }
}

如何使用Java fx做到这一点？