diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..3979c8c55 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,25 +1,126 @@
-function setAlarm() {}
+// -------- Alarm Clock Implementation --------
+let countdownInterval = null;
+let timeLeft = 0;
+let paused = false;
 
-// DO NOT EDIT BELOW HERE
+// -------- Main Functions --------
+function setAlarm() {
+  const input = document.getElementById("alarmSet");
+  const secondsInput = parseInt(input.value, 10);
 
-var audio = new Audio("alarmsound.mp3");
+  // Ignore invalid or zero/negative inputs
+  if (isNaN(secondsInput) || secondsInput <= 0) return;
 
-function setup() {
-  document.getElementById("set").addEventListener("click", () => {
-    setAlarm();
-  });
+  // Reset previous alarm
+  resetAlarm();
+
+  timeLeft = secondsInput;
+  updateHeading(timeLeft);
+
+  input.disabled = true;
+
+  countdownInterval = setInterval(() => {
+    if (!paused) {
+      timeLeft--;
 
-  document.getElementById("stop").addEventListener("click", () => {
-    pauseAlarm();
-  });
+      if (timeLeft <= 0) {
+        clearInterval(countdownInterval);
+        countdownInterval = null;
+        updateHeading(0);
+        playAlarm();
+        startFlashing();
+        input.disabled = false;
+      } else {
+        updateHeading(timeLeft);
+      }
+    }
+  }, 1000);
+}
+
+function pauseAlarm() {
+  paused = true;
+  audio.pause();
+  stopFlashing();
 }
 
+function resumeAlarm() {
+  if (timeLeft > 0) paused = false;
+}
+
+function stopAlarm() {
+  resetAlarm(); // fully stop everything
+}
+
+function resetAlarm() {
+  // Stop countdown
+  paused = false;
+  if (countdownInterval) {
+    clearInterval(countdownInterval);
+    countdownInterval = null;
+  }
+
+  // Stop flashing background
+  stopFlashing();
+
+  // Stop alarm sound if playing
+  if (audio) {
+    audio.pause();
+    audio.currentTime = 0;
+  }
+
+  // Reset countdown display
+  timeLeft = 0;
+  updateHeading(0);
+
+  // Clear and re-enable input
+  const input = document.getElementById("alarmSet");
+  if (input) {
+    input.value = "";
+    input.disabled = false;
+  }
+}
+
+// -------- Helper Functions --------
+function updateHeading(seconds) {
+  const heading = document.getElementById("timeRemaining");
+  const mins = Math.floor(seconds / 60)
+    .toString()
+    .padStart(2, "0");
+  const secs = (seconds % 60).toString().padStart(2, "0");
+  heading.innerText = `Time Remaining: ${mins}:${secs}`;
+}
+
+// ---------------- Flashing Screen (CSS-based) ----------------
+function startFlashing() {
+  document.body.classList.add("alarm-flashing");
+}
+
+function stopFlashing() {
+  document.body.classList.remove("alarm-flashing");
+  document.body.style.backgroundColor = "white";
+}
+
+// ---------------- Audio ----------------
+var audio = new Audio("alarmsound.mp3");
+
 function playAlarm() {
   audio.play();
 }
 
-function pauseAlarm() {
+function pauseAlarmSound() {
   audio.pause();
 }
 
+// ---------------- Setup Event Listeners ----------------
+function setup() {
+  document.getElementById("set").addEventListener("click", setAlarm);
+  document.getElementById("pause").addEventListener("click", pauseAlarm);
+  document.getElementById("resume").addEventListener("click", resumeAlarm);
+  document.getElementById("stop").addEventListener("click", stopAlarm);
+  document.getElementById("reset").addEventListener("click", resetAlarm);
+}
+
 window.onload = setup;
+
+
+// alarmclock.js modified 
\ No newline at end of file
diff --git a/Sprint-3/alarmclock/alarmclock.test.js b/Sprint-3/alarmclock/alarmclock.test.js
index 85b7356dc..2711258d1 100644
--- a/Sprint-3/alarmclock/alarmclock.test.js
+++ b/Sprint-3/alarmclock/alarmclock.test.js
@@ -2,6 +2,7 @@
 There are some Tests in this file that will help you work out if your code is working.
 */
 
+require("@testing-library/jest-dom");
 const path = require("path");
 const { JSDOM } = require("jsdom");
 
@@ -102,3 +103,6 @@ test("should play audio when the timer reaches zero", () => {
 
   expect(mockPlayAlarm).toHaveBeenCalledTimes(1);
 });
+
+
+// In alarmclock.test.js tests passed
\ No newline at end of file
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..6c3eafa22 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -4,17 +4,26 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <link rel="stylesheet" href="style.css" />
-    <title>Title here</title>
+    <title>Alarm clock app</title>
   </head>
   <body>
     <div class="centre">
       <h1 id="timeRemaining">Time Remaining: 00:00</h1>
-      <label for="alarmSet">Set time to:</label>
+
+      <label for="alarmSet">Set time in seconds:</label>
       <input id="alarmSet" type="number" />
 
-      <button id="set" type="button">Set Alarm</button>
-      <button id="stop" type="button">Stop Alarm</button>
+      <div class="buttons">
+        <button id="set" type="button">Set Alarm</button>
+        <button id="pause" type="button">Pause Alarm</button>
+        <button id="resume" type="button">Resume Alarm</button>
+        <button id="stop" type="button">Stop Alarm</button>
+        <button id="reset" type="button">Reset Alarm</button>
+      </div>
     </div>
-    <script src="alarmclock.js"></script>
+
+  <script src="alarmclock.js" type="module"></script>
   </body>
 </html>
+
+
diff --git a/Sprint-3/alarmclock/package.json b/Sprint-3/alarmclock/package.json
index e1331e071..129be86d5 100644
--- a/Sprint-3/alarmclock/package.json
+++ b/Sprint-3/alarmclock/package.json
@@ -4,7 +4,8 @@
   "license": "CC-BY-SA-4.0",
   "description": "You must update this package",
   "scripts": {
-    "test": "jest --config=../jest.config.js alarmclock"
+    "test": "jest --config=jest.config.js alarmclock"
+    
   },
   "repository": {
     "type": "git",
@@ -13,5 +14,9 @@
   "bugs": {
     "url": "https://github.com/CodeYourFuture/CYF-Coursework-Template/issues"
   },
-  "homepage": "https://github.com/CodeYourFuture/CYF-Coursework-Template#readme"
+  "homepage": "https://github.com/CodeYourFuture/CYF-Coursework-Template#readme",
+  "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "jsdom": "^20.0.3"
+  }
 }
diff --git a/Sprint-3/alarmclock/style.css b/Sprint-3/alarmclock/style.css
index 0c72de38b..800b3cb93 100644
--- a/Sprint-3/alarmclock/style.css
+++ b/Sprint-3/alarmclock/style.css
@@ -1,15 +1,74 @@
+/* Center everything on the page */
 .centre {
   position: fixed;
   top: 50%;
   left: 50%;
-  -webkit-transform: translate(-50%, -50%);
   transform: translate(-50%, -50%);
+  text-align: center;
+  font-family: Arial, sans-serif;
 }
 
-#alarmSet {
-  margin: 20px;
+/* Heading */
+h1 {
+  text-align: center;
+  font-size: 2em;
+  margin-bottom: 20px;
+  transition: background-color 0.2s ease; 
 }
 
-h1 {
+/* Input field */
+#alarmSet {
+  width: 80px;
+  padding: 5px;
+  font-size: 1em;
+  margin-bottom: 20px;
   text-align: center;
 }
+
+/* Buttons container */
+.buttons {
+  display: flex;
+  justify-content: center;
+  flex-wrap: wrap;
+  gap: 10px; /* space between buttons */
+  margin-top: 10px;
+}
+
+/* Buttons */
+button {
+  padding: 10px 20px;
+  font-size: 1em;
+  cursor: pointer;
+  border-radius: 5px;
+  border: none;
+  background-color: #007bff;
+  color: white;
+  transition: background-color 0.2s ease, transform 0.1s ease;
+}
+
+button:hover {
+  background-color: #0056b3;
+  transform: scale(1.05);
+}
+
+button:active {
+  transform: scale(0.95);
+}
+
+/* Input and buttons spacing */
+input,
+button {
+  margin: 5px;
+}
+
+/* Flashing background */
+@keyframes alarm-flash {
+  0%, 100% { background-color: white; }
+  50% { background-color: #add8e6; }
+}
+
+.alarm-flashing {
+  animation: alarm-flash 0.5s steps(1, end) infinite;
+}
+
+