diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..bb5564431 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,51 @@
-function setAlarm() {}
+//this variable holds the time independent of the function
+let Timer = null;
+
+function setAlarm() {
+ //this pulls the set time from whatever is entered as input on the html page
+ let inputValue = document.getElementById("alarmSet").value;
+
+ let remainingTime = Number(inputValue);
+
+ if (isNaN(remainingTime) || remainingTime <= 0) {
+ return;
+ }
+
+ //Time on screen in MM:SS format
+ updateTimerDisplay(remainingTime);
+
+ if (Timer !== null) {
+ clearInterval(Timer);
+ }
+
+ Timer = setInterval(function () {
+ remainingTime = remainingTime - 1; //timer is reduced by 1 second
+
+ updateTimerDisplay(remainingTime); //then updated
+
+ // When timer hits zero, stop timer and play alarm
+ if (remainingTime <= 0) {
+ clearInterval(Timer);
+ playAlarm();
+ }
+ }, 1000);
+}
+
+
+function updateTimerDisplay(seconds) {
+ let minutes = Math.floor(seconds / 60);
+ let secs = seconds % 60;
+
+ // Puts the figures in strings and in a clock-like format
+ let minuteStr = String(minutes).padStart(2, "0");
+ let secondStr = String(secs).padStart(2, "0");
+
+ // Update the heading text
+ document.getElementById(
+ "timeRemaining"
+ ).innerText = `Time Remaining: ${minuteStr}:${secondStr}`;
+
+}
// DO NOT EDIT BELOW HERE
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