favorite.js

// FAVORITE BOT====================

// find a random tweet and 'favorite' it
var favoriteTweet = function(){
  var params = {
      q: '#nodejs, #Nodejs',  // REQUIRED
      result_type: 'recent',
      lang: 'en'
  }
  // for more parametes, see: https://dev.twitter.com/rest/reference

  // find the tweet
  Twitter.get('search/tweets', params, function(err,data){

    // find tweets
    var tweet = data.statuses;
    var randomTweet = ranDom(tweet);   // pick a random tweet

    // if random tweet exists
    if(typeof randomTweet != 'undefined'){
      // Tell TWITTER to 'favorite'
      Twitter.post('favorites/create', {id: randomTweet.id_str}, function(err, response){
        // if there was an error while 'favorite'
        if(err){
          console.log('CANNOT BE FAVORITE... Error');
        }
        else{
          console.log('FAVORITED... Success!!!');
        }
      });
    }
  });
}
// grab & 'favorite' as soon as program is running...
favoriteTweet();
// 'favorite' a tweet in every 60 minutes
setInterval(favoriteTweet, 3600000);

// function to generate a random tweet tweet
function ranDom (arr) {
  var index = Math.floor(Math.random()*arr.length);
  return arr[index];
};