mearm-gong.js

var KS = require('./kickstarter-data/');
var MeArmPi   = require('../mearm-js/lib/MeArmPi.js').MeArmPi,
    arm       = new MeArmPi();

var backers = 0;

arm.moveBaseTo(20);

function drawBack(current, dest, cb){
  if(current < dest){
    current++;
    arm.moveBaseTo(current);
    setTimeout(function(){ drawBack(current, dest, cb)}, 50);
  }else{
    cb();
  }
}

function gong(cb){
  console.log("GONG!");
  drawBack(20, 90, function(){
    arm.moveBaseTo(0, function(res){
      if(res === 'complete') drawBack(0, 20, function(){});
    });
  })
}

var options = { url: "https://www.kickstarter.com/projects/mime/mearm-pi-build-your-own-raspberry-pi-powered-robot" }
var project = new KS.project(options);

function check(){
  project.backers(function(err, data){
    if(backers !== data.backers){
      backers = data.backers;
      console.log(backers);
      gong();
    }
  })
}

setInterval(check, 10000);