Create simple countdown timer

src/Timer.js

@@ -0,0 +1,36 @@
+// Timer.js
+
+import React from 'react';
+import { useState } from 'react';
+
+const Timer = () => {
+    const [days, setDays] = useState(0);
+    const [hours, setHours] = useState(0);
+    const [minutes, setMinutes] = useState(0);
+    const [seconds, setSeconds] = useState(0);
+
+    // Assign a deadline for counter to count down to, in full month/day/year format.
+    const deadline = "December, 31, 2022";
+
+    const getTime = () => {
+        const time = Date.parse(deadline) - Date.now();
+
+        setDays(Math.floor(time / (1000 * 60 * 60 * 24)));
+        setHours(Math.floor((time / (1000 * 60 * 60)) % 24));
+        setMinutes(Math.floor((time / 1000 / 60) % 60));
+        setSeconds(Math.floor((time / 1000) % 60));
+    };
+
+    React.useEffect(() => {
+        const interval = setInterval(() => getTime(deadline), 1000);
+
+        return () => clearInterval(interval);
+    }, []);
+
+  return (
+    <div className="timer">
+    </div>
+  );
+};
+
+export default Timer;