diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..fcec893af 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,5 +1,57 @@
-function setAlarm() {}
+let countDown;
+let remainingSeconds = 0;
+function setAlarm() {
+ let timeRemaining = document.getElementById("timeRemaining");
+ let alarmSet = document.getElementById("alarmSet").value;
+
+ remainingSeconds = parseInt(alarmSet);
+
+ if (isNaN(remainingSeconds) || remainingSeconds <= 0) {
+ alert("please enter a value greater than zero!");
+ return;
+ }
+
+ if (remainingSeconds > 86400) {
+ alert("Please enter a time less than 24 hourse (86,400)");
+ return;
+ }
+ displayTime();
+
+ if (countDown) {
+ clearInterval(countDown);
+ }
+ countDown = setInterval(timer, 1000);
+}
+
+function displayTime() {
+ let timeRemaining = document.getElementById("timeRemaining");
+ let hour = Math.floor(remainingSeconds / 3600);
+ let minutes = Math.floor((remainingSeconds % 3600) / 60);
+ let seconds = Math.floor(remainingSeconds % 60);
+
+ if (minutes < 10) {
+ minutes = "0" + minutes;
+ }
+ if (seconds < 10) {
+ seconds = "0" + seconds;
+ }
+
+ if (hour > 0) {
+ timeRemaining.textContent = `Time Remaining: ${hour}:${minutes}:${seconds}`;
+ } else {
+ timeRemaining.textContent = `Time Remaining: ${minutes}:${seconds}`;
+ }
+}
+
+function timer() {
+ remainingSeconds--;
+ displayTime();
+ if (remainingSeconds <= 0) {
+ clearInterval(countDown);
+ playAlarm();
+ }
+}
// DO NOT EDIT BELOW HERE
var audio = new Audio("alarmsound.mp3");
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..9b71b5b6e 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -4,7 +4,7 @@
- Title here
+ Alarm Clock