function fetchData(){
	var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      console.log(this.responseText)
    }
  };
  xhttp.open("GET", "https://marvelheroesapi.herokuapp.com/api", true);
  xhttp.send();
}