old_contents: 'use strict';
  
  let ledCharacteristic = null;
  
  function onConnected() {
      document.querySelector('.connect-button').classList.add('hidden');
      document.querySelector('.color-buttons').classList.remove('hidden');
      document.querySelector('.mic-button').classList.remove('hidden');
  }
  
  function connect() {
      console.log('Requesting Bluetooth Device...');
      navigator.bluetooth.requestDevice(
          {
              filters: [{ services: [0xffe5] }]
          })
          .then(device => {
              console.log('> Found ' + device.name);
              console.log('Connecting to GATT Server...');
              return device.gatt.connect();
          })
          .then(server => {
              console.log('Getting Service 0xffe5 - Light control...');
              return server.getPrimaryService(0xffe5);
          })
          .then(service => {
              console.log('Getting Characteristic 0xffe9 - Light control...');
              return service.getCharacteristic(0xffe9);
          })
          .then(characteristic => {
              console.log('All ready!');
              ledCharacteristic = characteristic;
              onConnected();
          })
          .catch(error => {
              console.log('Argh! ' + error);
          });
  }
  
  function setColor(red, green, blue) {
      var buffer = new ArrayBuffer(7);
      var view = new Uint8Array(buffer);
      view[0] = 0x56;
      view[1] = red;
      view[2] = green;
      view[3] = blue;
      view[4] = 0x00;
      view[5] = 0xf0;
      view[6] = 0xaa;
      return ledCharacteristic.writeValue(buffer)
          .catch(err => console.log('Error when writing value! ', err));
  }
  
  function red() {
      return setColor(255, 0, 0)
          .then(() => console.log('Color set to Red'));
  }
  
  function green() {
      return setColor(0, 255, 0)
          .then(() => console.log('Color set to Green'));
  }
  
  function blue() {
      return setColor(0, 0, 255)
          .then(() => console.log('Color set to Blue'));
  }
  
  function listen() {
      annyang.start({ continuous: true });
  }
  
  // Voice commands
  annyang.addCommands({
      'red': red,
      'green': green,
      'blue': blue
  });
  
  // Install service worker - for offline support
  if('serviceWorker' in navigator) {
  	navigator.serviceWorker.register('serviceworker.js');
  }
  
new_contents: 'use strict';
  
  let ledCharacteristic = null;
  
  function onConnected() {
      document.querySelector('.connect-button').classList.add('hidden');
      document.querySelector('.color-buttons').classList.remove('hidden');
      document.querySelector('.mic-button').classList.remove('hidden');
  }
  
  function connect() {
      console.log('Requesting Bluetooth Device...');
      navigator.bluetooth.requestDevice(
          {
              filters: [{ services: [0xffe5] }]
          })
          .then(device => {
              console.log('> Found ' + device.name);
              console.log('Connecting to GATT Server...');
              return device.gatt.connect();
          })
          .then(server => {
              console.log('Getting Service 0xffe5 - Light control...');
              return server.getPrimaryService(0xffe5);
          })
          .then(service => {
              console.log('Getting Characteristic 0xffe9 - Light control...');
              return service.getCharacteristic(0xffe9);
          })
          .then(characteristic => {
              console.log('All ready!');
              ledCharacteristic = characteristic;
              onConnected();
          })
          .catch(error => {
              console.log('Argh! ' + error);
          });
  }
  
  function setColor(red, green, blue) {
      var buffer = new ArrayBuffer(7);
      var view = new Uint8Array(buffer);
      view[0] = 0x56;
      view[1] = red;
      view[2] = green;
      view[3] = blue;
      view[4] = 0x00;
      view[5] = 0xf0;
      view[6] = 0xaa;
      return ledCharacteristic.writeValue(buffer)
          .catch(err => console.log('Error when writing value! ', err));
  }
  
  function red() {
      return setColor(255, 0, 0)
          .then(() => console.log('Color set to Red'));
  }
  
  function green() {
      return setColor(0, 255, 0)
          .then(() => console.log('Color set to Green'));
  }
  
  function blue() {
      return setColor(0, 0, 255)
          .then(() => console.log('Color set to Blue'));
  }
  
  function listen() {
      annyang.start({ continuous: true });
  }
  
  // Voice commands
  annyang.addCommands({
      'red': red,
      'green': green,
      'blue': blue
  });
  
  // Install service worker - for offline support
  if ('serviceWorker' in navigator) {
      navigator.serviceWorker.register('serviceworker.js');
  }
  
subject: format code