diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/Alarm-clock-app.html
similarity index 100%
rename from Sprint-3/alarmclock/index.html
rename to Sprint-3/alarmclock/Alarm-clock-app.html
diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..092769101 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,5 +1,49 @@
-function setAlarm() {}
+let countdownInterval = null;
 
+function setAlarm() {
+  const input = document.getElementById("alarmSet");
+  let totalSeconds = parseInt(input.value, 10);
+
+  // Return early if input is invalid
+  if (isNaN(totalSeconds) || totalSeconds <= 0) {
+    return;
+  }
+
+  // 1. Reset Audio: Stop audio if it's currently playing from a previous alarm
+  pauseAlarm();
+  audio.currentTime = 0; // Rewind audio track back to the start
+
+  // 2. Reset Interval: Clear existing active countdown
+  if (countdownInterval) {
+    clearInterval(countdownInterval);
+  }
+
+  const heading = document.getElementById("timeRemaining");
+
+  function updateDisplay(seconds) {
+    const minutes = Math.floor(seconds / 60);
+    const remSeconds = seconds % 60;
+
+    const formattedMinutes = String(minutes).padStart(2, "0");
+    const formattedSeconds = String(remSeconds).padStart(2, "0");
+
+    heading.textContent = `Time Remaining: ${formattedMinutes}:${formattedSeconds}`;
+  }
+
+  updateDisplay(totalSeconds);
+
+  input.value = "";
+
+  countdownInterval = setInterval(() => {
+    totalSeconds--;
+    updateDisplay(totalSeconds);
+
+    if (totalSeconds <= 0) {
+      clearInterval(countdownInterval);
+      playAlarm();
+    }
+  }, 1000);
+}
 // DO NOT EDIT BELOW HERE
 
 var audio = new Audio("alarmsound.mp3");