diff --git a/lesson-06/service-wookiee/main.js b/lesson-06/service-wookiee/main.js
index d3c8b4e..ef9c810 100644
--- a/lesson-06/service-wookiee/main.js
+++ b/lesson-06/service-wookiee/main.js
@@ -1,6 +1,31 @@
 const template = document.querySelector("#template").content;
 const boxes = document.querySelector("#boxes");
 
+if ("serviceWorker" in navigator) {
+  window.addEventListener("load", function () {
+    navigator.serviceWorker.register("/sw.js").then(
+      function (registration) {
+        // Registration was successful
+        console.log(
+          "ServiceWorker registration successful with scope: ",
+          registration.scope
+        );
+      },
+      function (err) {
+        // registration failed :(
+        console.log("ServiceWorker registration failed: ", err);
+      }
+    );
+  });
+}
+
+let counts = 0;
+
+navigator.serviceWorker.addEventListener("message", (e) => {
+  counts++;
+  document.querySelector("#request-count").innerHTML = counts;
+});
+
 for (const fileType of ["text/css", "text/html", "application/json"]) {
   // Clone the template for each box
   const box = template.cloneNode(true);
diff --git a/lesson-06/service-wookiee/sw.js b/lesson-06/service-wookiee/sw.js
new file mode 100644
index 0000000..156685a
--- /dev/null
+++ b/lesson-06/service-wookiee/sw.js
@@ -0,0 +1,44 @@
+self.addEventListener("install", async (e) => {
+  console.log("installed");
+});
+
+self.addEventListener("fetch", async (e) => {
+  let client = await clients.get(e.clientId);
+  if (client) {
+    client.postMessage("test");
+  }
+});
+
+self.addEventListener("fetch", async (e) => {
+  console.log(e.request.url);
+  switch (e.request.url.split("/").pop()) {
+    case "fake.css":
+      e.respondWith(
+        new Response("css", {
+          status: 200,
+          statusText: `You tried to fetch ${e.request.destination}`,
+        })
+      );
+      break;
+    case "fake.html":
+      e.respondWith(
+        new Response("htnl", {
+          status: 200,
+          statusText: `You tried to fetch ${e.request.destination}`,
+        })
+      );
+      break;
+    case "fake.json":
+      e.respondWith(
+        new Response("json", {
+          status: 200,
+          statusText: `You tried to fetch ${e.request.destination}`,
+        })
+      );
+      break;
+
+    default:
+      "Request failed";
+      break;
+  }
+});