void ChangeSimSpeed(SimSpeed newSpeed)
        {
            SimSpeed oldSpeed = simulator.GetSimSpeed();
            string   oldStr   = $"speed{oldSpeed}";

            simSpeedButtons[(int)oldSpeed].sprite = Style.sprites[oldStr];

            string newStr = $"speed{newSpeed}Sel";

            simSpeedButtons[(int)newSpeed].sprite = Style.sprites[newStr];

            simulator.ChangeSimSpeed(newSpeed);
        }