code.gs

// Fill out the Twitter Keys and then choose Run -> Start Bot

TWITTER_CONSUMER_KEY    = "";
TWITTER_CONSUMER_SECRET = "";
TWITTER_ACCESS_TOKEN    = "";
TWITTER_ACCESS_SECRET   = "";
TWITTER_SEARCH_PHRASE   = ""; // ex. "#DevFest -RT" (the "-RT" excludes re-Tweets)

function Start_Bot() {
  var props = PropertiesService.getScriptProperties();
  
  props.setProperties({
    TWITTER_CONSUMER_KEY: TWITTER_CONSUMER_KEY,
    TWITTER_CONSUMER_SECRET: TWITTER_CONSUMER_SECRET,
    TWITTER_ACCESS_TOKEN: TWITTER_ACCESS_TOKEN,
    TWITTER_ACCESS_SECRET: TWITTER_ACCESS_SECRET,
    SINCE_TWITTER_ID: 0
  });
  
  ScriptApp.newTrigger("hashtag_twitterBot")
  .timeBased()
  .everyMinutes(10)
  .create();
}

function hashtag_twitterBot() {
  try {
    var props = PropertiesService.getScriptProperties(),
        twit = new Twitter.OAuth(props);
    
    if (twit.hasAccess()) {
      var tweets = twit.fetchTweets(
        TWITTER_SEARCH_PHRASE, function(tweet) {
          // Skip tweets that contain sensitive content
          if (!tweet.possibly_sensitive) {
            return tweet.id_str;
          }
        }, {
          multi: true,
          lang: "en", // Process only English tweets
          count: 5,   // Process 5 tweets in a batch
          since_id: props.getProperty("SINCE_TWITTER_ID")
        });
      
      if (tweets.length > 0) {
        props.setProperty("SINCE_TWITTER_ID", tweets[0]);
        
        for (var i = tweets.length - 1; i >= 0; i--) {
          twit.retweet(tweets[i]);
          twit.favorite(tweets[i]);
          /* Wait between 10 seconds and 1 minute */
          Utilities.sleep(Math.floor(Math.random()*50000) + 10000);
        }
      }
    }
  } catch (f) {
    Logger.log("Error: " + f.toString());
  }
}