// Test Urn class.
public static void Main()
{
    Urn u = new Urn(10);
    Console.WriteLine(u.TotalBalls);

    Console.WriteLine(u);
    Console.WriteLine(u.BallsRemaining());
    for (int i = 1; i <= 5; i++)
    {
        Console.WriteLine(u.Draw());
    }
    Console.WriteLine();

    Console.WriteLine(u);
    Console.WriteLine(u.BallsRemaining());
    for (int i = 1; i <= 5; i++)
    {
        Console.WriteLine(u.Draw());
    }
    Console.WriteLine();

    Console.WriteLine(u);
    Console.WriteLine(u.BallsRemaining());
    Console.WriteLine(u.Draw());

    Console.ReadLine();
}