public void UpdateFuelButtons()
    {
        List <FuelObject> discoveredFuel = progressManager.GetDiscoveredFuel();

        for (int i = 0; i < discoveredFuel.Count; i++)
        {
            switch (discoveredFuel[i].fuelName)
            {
            case "Kersone":
                buttonKerosene.sprite = kerosene;
                break;

            case "Hydrogen":
                buttonLiquidHydrogen.sprite = hydrogen;
                break;

            case "Coal":
                buttonCoal.sprite = coal;
                break;

            case "LOX":
                buttonLOX.sprite = lox;
                break;

            case "RP1":
                buttonRP1.sprite = rp1;
                break;

            case "Aerozine":
                buttonAerozine.sprite = aerozine;
                break;

            case "Diesel":
                buttonDiesel.sprite = diesel;
                break;

            default:
                break;
            }
        }

        if (progressManager.GetCurrentFuel().name == "Kerosene")
        {
            currentFuelTypeImage.sprite = kerosene;
        }
        else if (progressManager.GetCurrentFuel().name == "Hydrogen")
        {
            currentFuelTypeImage.sprite = hydrogen;
        }
    }