lets.coffee

request = require 'request'
async   = require 'async'
url     = "http://letsrevolutionizetesting.com/challenge.json"
id      = null
message = null

async.whilst ->
  not message?
, (callback) ->
  oUurl = url
  oUurl += "?id=#{id}" if id?
  request oUurl, (err, res, body) =>
    body   = JSON.parse(body)
    follow = body.follow
    unless follow?
      message = body.message
      return callback()
    id     = follow.split('id=')[1]
    callback()
, (err) ->
  console.log 'Error: ', err if err
  console.log message