diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..44f909551 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,73 @@
-function setAlarm() {}
+const oneSecondInMilliseconds = 1000;
+const lengthOfAlarmSound = 20000;
+
+let timeLeft;
+let intervalID;
+let timeoutID;
+let display;
+
+function setAlarm() {
+ stopAlarm();
+
+ // set up time
+ timeLeft = document.getElementById("alarmSet").value;
+ display = document.getElementById("timeRemaining");
+
+ // validate result
+ const result = parseInt(timeLeft);
+ if (isNaN(result)) {
+ return;
+ }
+
+ display.textContent = formatTime(timeLeft);
+
+ if (!intervalID) {
+ intervalID = setInterval(updateTimer, 1000);
+ }
+
+ console.log(`Alarm set for ${timeLeft} seconds`);
+}
+
+function updateTimer() {
+ timeLeft = timeLeft - 1;
+
+ display.textContent = formatTime(timeLeft);
+
+ if (timeLeft <= 0) {
+ alarmFinished();
+ cleanUp();
+ }
+}
+
+// give a time in seconds
+function formatTime(seconds) {
+ minutes = Math.floor(seconds / 60);
+ seconds = seconds % 60;
+
+ const seconds_padded = String(seconds).padStart(2, "0");
+ const minutes_paddded = String(minutes).padStart(2, "0");
+
+ const formatted_seconds = `Time Remaining: ${minutes_paddded}:${seconds_padded}`;
+ return formatted_seconds;
+}
+
+function stopAlarm() {
+ pauseAlarm();
+ cleanUp();
+}
+
+function cleanUp() {
+ clearInterval(intervalID);
+ clearTimeout(timeoutID);
+ timeoutID = null;
+ intervalID = null;
+}
+
+function alarmFinished() {
+ audio.loop = true;
+ playAlarm();
+ console.log("Alarm finished");
+}
// DO NOT EDIT BELOW HERE
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..66748001e 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -1,10 +1,10 @@
-
+
- Title here
+ Alarm clock app