public static void pickMarker()
		{
		System.out.println("Would you like to play as X or O?");
		Scanner keyboard = new Scanner(System.in);
		playerMarker = keyboard.nextLine();
		if ((!"X".equals(playerMarker) && (!"O".equals(playerMarker))))
			{
			System.out.println("Sorry, that is not a valid option.");
			}
		if ("X".equals(playerMarker))
			{
			computerMarker = "O";
			System.out.println("Okay, you will play as " + playerMarker + "!");
			}
		else 
			{
			computerMarker = "X";
			System.out.println("Okay, you will play as O!");
			}
		}