old_contents: // insert service worker scripts here
  this.addEventListener("install", function (event) {
        event.waitUntil(
          caches.open('v1').then(function (cache) {
            cache.addAll(['/html/', 
            	'/html/img/trapped_lady.jpg', 
            	'/html/img/screaming.jpg', 
            	'/html/img/location4.jpg', 
            	'/html/img/embrace3.jpg',
            	'/html/img/bg.jpg',
            	'/html/img/timer.png'
            	]);
          })
          );
      });
  
  this.addEventListener("fetch", function (event) {
  	event.respondWith(new response(alert('this is how the game goes')))
  });   
new_contents: // insert service worker scripts here
  this.addEventListener("install", function (event) {
        event.waitUntil(
          caches.open('v1').then(function (cache) {
            cache.addAll(['/html/', 
            	'/html/img/trapped_lady.jpg', 
            	'/html/img/screaming.jpg', 
            	'/html/img/location4.jpg', 
            	'/html/img/embrace3.jpg',
            	'/html/img/bg.jpg',
            	'/html/img/timer.png'
            	]);
          })
          );
      });
  
  this.addEventListener('fetch', function (event) {
  	event.respondWith(new response('<p>Hello from your friendly neighbourhood servce worker</p>'))
  });   
subject: test try