private void drawRound(Graphics g,
			HashSet<IP> round,
			int k)
	{
		int i = 0;
		int n = round.size();
		int x;
		int y;
		for (IP ip : round) {
			
			x = xCircleCoord(i, n, k)-4;
			y = yCircleCoord(i, n, k)-4;
			g.fillOval(x, y, 9, 9);
			g.drawString(ip.toString(), x, y);
			i++;
		}
	}