rainforest-callenge.js

// try this online: https://codepen.io/Xiwi/pen/jOEXJRa?editors=0010
// (don't forget to open the console)

const getData = function(url) {
  axios.get(url)
    .then(function(response){
      let follow = response.data.follow;
      if (follow) {
        follow = follow.replace('challenge?', 'challenge.json?');
        console.log(follow);
        getData(follow);
      } else {
        console.log(response.data.message);
      }
  });  
}

const url = 'https://letsrevolutionizetesting.com/challenge.json';
getData(url);