diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..0f7a1263e 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,36 @@
-function setAlarm() {}
+function timeConvert(sec) {
+  let minutes = String(Math.floor(sec / 60)).padStart(2, "0");
+  let seconds = String(sec % 60).padStart(2, "0");
+  return `${minutes}:${seconds}`;
+}
+
+let timer;
+function setAlarm() {
+  clearInterval(timer);
+  pauseAlarm();
+
+  const timeInput = document.getElementById("alarmSet");
+  let remainingSeconds = parseInt(timeInput.value);
+  if (isNaN(remainingSeconds) || remainingSeconds <= 0) {
+    alert("Please provide a valid number of seconds");
+    return;
+  }
+
+  timeInput.value = "";
+
+  const timeRemaining = document.getElementById("timeRemaining");
+
+  timeRemaining.textContent = `Time Remaining: ${timeConvert(remainingSeconds)}`;
+
+  timer = setInterval(() => {
+    remainingSeconds--;
+    timeRemaining.textContent = `Time Remaining: ${timeConvert(remainingSeconds)}`;
+    if (remainingSeconds === 0) {
+      playAlarm();
+      clearInterval(timer);
+    }
+  }, 1000);
+}
 
 // DO NOT EDIT BELOW HERE
 
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..36715d7d9 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -1,20 +1,23 @@
 <!DOCTYPE html>
 <html lang="en">
-  <head>
-    <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>
-  </head>
-  <body>
-    <div class="centre">
-      <h1 id="timeRemaining">Time Remaining: 00:00</h1>
-      <label for="alarmSet">Set time to:</label>
-      <input id="alarmSet" type="number" />
 
-      <button id="set" type="button">Set Alarm</button>
-      <button id="stop" type="button">Stop Alarm</button>
-    </div>
-    <script src="alarmclock.js"></script>
-  </body>
-</html>
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="style.css" />
+  <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>
+    <input id="alarmSet" type="number" />
+
+    <button id="set" type="button">Set Alarm</button>
+    <button id="stop" type="button">Stop Alarm</button>
+  </div>
+  <script src="alarmclock.js"></script>
+</body>
+
+</html>
\ No newline at end of file
