old_contents: "use strict";
  
  function audio(url) {
    return new Audio(url);
  }
  
  const red = audio("https://s3.amazonaws.com/freecodecamp/simonSound1.mp3");
  const blue = audio("https://s3.amazonaws.com/freecodecamp/simonSound2.mp3");
  const green = audio("https://s3.amazonaws.com/freecodecamp/simonSound3.mp3");
  const yellow = audio("https://s3.amazonaws.com/freecodecamp/simonSound4.mp3");
  const error = audio("error.wav");
  
  const sounds = {
    red: red,
    blue: blue,
    green: green,
    yellow: yellow,
    error: error
  };
  
  exports.play = function(sound) {
    return function() {
      sounds[sound].play();
    };
  };
  
new_contents: "use strict";
  
  function audio(url) {
    return new Audio(url);
  }
  
  const red = audio("https://s3.amazonaws.com/freecodecamp/simonSound1.mp3");
  const blue = audio("https://s3.amazonaws.com/freecodecamp/simonSound2.mp3");
  const green = audio("https://s3.amazonaws.com/freecodecamp/simonSound3.mp3");
  const yellow = audio("https://s3.amazonaws.com/freecodecamp/simonSound4.mp3");
  const error = audio("https://s3.amazonaws.com/adam-recvlohe-sounds/error.wav");
  
  const sounds = {
    red: red,
    blue: blue,
    green: green,
    yellow: yellow,
    error: error
  };
  
  exports.play = function(sound) {
    return function() {
      sounds[sound].play();
    };
  };
  
subject: Add error sound to s3