void Awake()
	{
		if (instance == null)
		{
			instance = this;
		}
		else
		{
			Debug.LogError("There is more than one PopulationAssignment in the scene!");
		}
	}
	void OnEnable () 
	{
		pop = PopulationAssignment.instance;
	}
	void Start () 
	{
		pop = PopulationAssignment.instance;

	}