expire soon.',
          'going to time out soon.',
          ]);
    } else {
      message = core.sample([
        'You are running out of time, aren\'t you?',
        'You have 10 new messages.',
        'Your mother is calling you for dinner.',
        'Please do not panic.',
        'This is an annoying popup message.',
        'It looks like you are trying to log in.',
        'You look good today.',
        'Sorry for this annoying message.',
        ]);
    }
    d3.select('#area').append('div').att