void OnDestroy()
{
if (instance == this)
{
instance = null;
}
}
// Use this for initialization
void Awake()
{
if (instance != null)
{
Destroy(gameObject);
return;
}
instance = this;
// numCarsSlider.onValueChanged.AddListener(NumCarsSliderValueChanged);
// highwaySizeSlider.onValueChanged.AddListener(HighwaySizeSliderValueChanged);
}