first working version

components/header.js

@@ -0,0 +1,27 @@
+import React, { useEffect, useState } from "react";
+
+const Header = () => {
+  const [gifUrl, setGifUrl] = useState(null);
+  useEffect(() => {
+    async function getGif() {
+      const response = await fetch(
+        "//api.giphy.com/v1/gifs/random?tag=christmas&api_key=3ziHSa4ptYJdv2dOuawgzpBhhiW09Ss1"
+      );
+      const { data } = await response.json();
+      setGifUrl(data.image_mp4_url);
+    }
+
+    getGif();
+  }, []);
+
+  return (
+    <div className="header">
+      <h1>Bello's Adventskalender 2020</h1>
+      {gifUrl && (
+        <video className="yay-gif-video" src={gifUrl} autoPlay loop muted />
+      )}
+    </div>
+  );
+};
+
+export default Header;