public static void rotateExpansionVector()
	{
		int eX = expansionVector.x, eY = expansionVector.y;
		
		if(eX == 1 && eY == 0)
		{
			eX = 0;
			eY = 1;
		}
		else if(eX == 0 && eY == 1)
		{
			eX = -1;
			eY = 0;
		}
		else if(eX == -1 && eY == 0)
		{
			eX = 0;
			eY = -1;
		}
		else if(eX == 0 && eY == -1)
		{
			eX = 1;
			eY = 0;
		}
		
		expansionVector = new Point(eX, eY);
	}