Rotate the triangle

index.html

@@ -1,7 +1,13 @@
 <!DOCTYPE html>
 <html>
 	<head>
-		<script src="./panorama-viewer.js"></script>
+		<script
+			src="https://cdnjs.cloudflare.com/ajax/libs/gl-matrix/2.8.1/gl-matrix-min.js"
+			integrity="sha512-zhHQR0/H5SEBL3Wn6yYSaTTZej12z0hVZKOv3TwCUXT1z5qeqGcXJLLrbERYRScEDDpYIJhPC1fk31gqR783iQ=="
+			crossorigin="anonymous"
+			defer
+			></script>
+		<script src="./panorama-viewer.js" defer></script>
 	</head>
 	<body>
 		<h1>Panorama Viewer</h1>