diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..255987cbd 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,53 @@
-function setAlarm() {}
+let countdownInterval = null;
+let secondsLeft = 0;
+
+function setAlarm() {
+ // Read the minutes from the input
+ const input = document.getElementById("alarmSet");
+ const minutes = parseInt(input.value, 10);
+ // If nothing useful was entered, do nothing
+ if (isNaN(minutes) || minutes <= 0) {
+ return;
+ }
+ // Convert to total seconds
+ secondsLeft = minutes;
+ // Stop any existing countdown
+ if (countdownInterval !== null) {
+ clearInterval(countdownInterval);
+ countdownInterval = null;
+ }
+ // Show starting time right away
+ updateTimeDisplay();
+
+ // Start the countdown
+ countdownInterval = setInterval(() => {
+ secondsLeft = secondsLeft - 1;
+
+ updateTimeDisplay();
+
+ if (secondsLeft <= 0) {
+ // Time's up
+ clearInterval(countdownInterval);
+ countdownInterval = null;
+ secondsLeft = 0;
+ // Makes sure to show exactly 00:00
+ updateTimeDisplay();
+ playAlarm();
+ }
+ }, 1000);
+}
+
+// Helper function
+function updateTimeDisplay() {
+ const minutes = Math.floor(secondsLeft / 60);
+ const seconds = secondsLeft % 60;
+
+ const displayMin = minutes.toString().padStart(2, "0");
+ const displaySec = seconds.toString().padStart(2, "0");
+
+ const heading = document.getElementById("timeRemaining");
+ heading.textContent = `Time Remaining: ${displayMin}:${displaySec}`;
+}
// DO NOT EDIT BELOW HERE
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..18a51fc66 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -1,10 +1,10 @@
-
+
- Title here
+ Alarm Clock App