diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..1fdaf20e6 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,48 @@
-function setAlarm() {}
+let timer;
+
+function setAlarm() {
+  const input = document.getElementById("alarmSet").value;
+  let timeLeft = Number(input);
+
+  updateDisplay(timeLeft);
+
+  if (input === "" || isNaN(timeLeft)) {
+    return;
+  }
+
+  if (timeLeft < 0) {
+    return;
+  }
+
+  updateDisplay(timeLeft);
+
+  clearInterval(timer);
+
+  timer = setInterval(() => {
+    timeLeft--;
+
+    updateDisplay(timeLeft);
+
+    if (timeLeft <= 0) {
+      clearInterval(timer);
+      playAlarm();
+      document.body.style.backgroundColor = "red";
+    }
+  }, 1000);
+}
+
+function updateDisplay(secondsLeft) {
+  const heading = document.getElementById("timeRemaining");
+
+  if (secondsLeft < 0) {
+    secondsLeft = 0;
+  }
+
+  const minutes = Math.floor(secondsLeft / 60);
+  const seconds = secondsLeft % 60;
+
+  heading.innerText = `Time Remaining: ${String(minutes).padStart(2, "0")}:${String(seconds).padStart(2, "0")}`;
+}
 
 // DO NOT EDIT BELOW HERE