var ref = new Firebase('https://stackoverflow.firebaseio.com/37950590');

​

ref.on('value', function (s) {console.log(JSON.stringify(s.val(), null, '  ').replace(/"/g, "'"));});

​

function update(updates) {

  console.log(JSON.stringify(updates,null, '  ').replace(/"/g, "'"));

  ref.update(updates).then(function() {

    console.log('updated');

  }).catch(function(error) {

    console.error(error);

  });

}

​

function vote(auth) {

  console.log('vote');

  ref.child('voteCount').once('value', function(voteCount) {

    var updates = {};

    updates['votes/'+auth.uid] = true;

    updates.voteCount = voteCount.val() + 1;

    update(updates);

  });  

}

function unvote(auth) {

  console.log('unvote');

  ref.child('voteCount').once('value', function(voteCount) {

    var updates = {};

    updates['votes/'+auth.uid] = null;

    updates.voteCount = voteCount.val() - 1;

    update(updates);

  });  

}

​

ref.authAnonymously(function(error, auth) {

  vote(ref.getAuth());

  setTimeout(function() {

    vote(ref.getAuth());

  }, 5000);

  setTimeout(function() {

    unvote(ref.getAuth());

  }, 10000);

  setTimeout(function() {

    unvote(ref.getAuth());

  }, 15000);

});