diff --git a/public/X3DOMTutorial/indexedfaceset2.html b/public/X3DOMTutorial/indexedfaceset2.html
index a1ba27246c1393b1fc5ea06e81146149ddb64128..04a7be2fa4754a4f954e50c28bc3b4200e9faa8a 100644
--- a/public/X3DOMTutorial/indexedfaceset2.html
+++ b/public/X3DOMTutorial/indexedfaceset2.html
@@ -1,250 +1,263 @@
-<html>
-
-<head>
-	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-	<title> Indexed Face Set</title>
-	<link rel="stylesheet" type="text/css" href="x3dom.css">
-	</link>
-</head>
-
-<body>
-	<h1> Indexed Face Set </h1>
-	<table width="100%" height="85%" border="0">
-		<tr>
-			<td width="50%" align="center" valign="top" scope="col">
-				<X3D id="shapedata" width="600px" height="600px" style="float:left">
-					<Scene>
-						<Shape>
-							<Appearance>
-								<Material diffuseColor="0.5 0.5 0.5"> </Material>
-							</Appearance>
-							<IndexedFaceSet solid="false" ccw="true" coordIndex=" 0 4 5 1 -1 1 2 6 5 -1 2 3 7 6 -1
-                             3 0 4 7 -1 0 1 2 3 -1 7 4 8 -1
-                             4 5 8 -1 5 6 8 -1 6 7 8 -1  
-					     9 13 14 10 -1 10 11 15 14 -1 11 12 16 15 -1
-                             12 9 13 16 -1 9 10 11 12 -1 16 13 17 -1
-                             13 14 17 -1 14 15 17 -1 15 16 17 -1">
-								<Coordinate point="-1 0 1, 1 0 1, 1 0 -1, -1 0 -1,
-             	            -1 2 1, 1 2 1, 1 2 -1, -1 2 -1, 0 3 0, 
-							2 0 1, 4 0 1, 4 0 -1, 2 0 -1,
-             	            2 2 1, 4 2 1, 4 2 -1, 2 2 -1, 3 3 0 ">
-								</Coordinate>
-							</IndexedFaceSet>
-						</Shape>
-						<!-- add points (as spheres) and labels -->
-						<!-- P0 -->
-						<Transform translation='-1 0 1'>
-							<Shape DEF='Point'>
-								<Appearance DEF='Green'>
-									<Material diffuseColor='0 1 0'> </Material>
-								</Appearance>
-								<Sphere radius="0.1"> </Sphere>
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance DEF='LABEL_APPEARANCE'>
-											<Material diffuseColor='0 0 0'> </Material>
-										</Appearance>
-										<Text string='"P0"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P1 -->
-						<Transform translation='1 0 1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P1"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P2 -->
-						<Transform translation='1 0 -1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P2"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P3 -->
-						<Transform translation='-1 0 -1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P3"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P4 -->
-						<Transform translation='-1 2 1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P4"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P5 -->
-						<Transform translation='1 2 1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P5"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P6 -->
-						<Transform translation='1 2 -1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P6"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P7 -->
-						<Transform translation='-1 2 -1'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 -0.75 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P7"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-						<!-- P8 -->
-						<Transform translation='0 3 0'>
-							<Shape USE="Point">
-							</Shape>
-							<Transform translation='0 0.0 0'>
-								<Billboard>
-									<Shape>
-										<Appearance USE='LABEL_APPEARANCE'>
-										</Appearance>
-										<Text string='"P8"'>
-											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
-										</Text>
-									</Shape>
-								</Billboard>
-							</Transform>
-						</Transform>
-					</Scene>
-				</X3D>
-			</td>
-			<td width="50%" align="left" valign="top" scope="col">
-				An IndexedFaceSet is used to define a polygonal shape. For example, it can be used to model a building.
-				The building geometry is given by a set of points P={P0, P1, ..., Pn}
-				and a set of polygons F={F0, F1, ..., Fm}. Each point Pi is given by its coordinates Pi=(xi,yi,zi).
-				Each polygon Fi is defined by a list of m coplanar points (m >=3) given in counterclockwise order:
-				Fi=(Pi0, Pi1, ... Pim)
-				<pre>
-	Example:
-	P = {P0, P1, P2, P3, P4, P5, P6, P7, P8}
-	with
-        P0 = (-1.0, 0.0,  1.0)
-	P1 = ( 1.0, 0.0,  1.0)
-	P2 = ( 1.0, 0.0, -1.0)
-	P3 = (-1.0, 0.0, -1.0)
-        P4 = (-1.0, 2.0,  1.0)
-	P5 = ( 1.0, 2.0,  1.0)
-	P6 = ( 1.0, 2.0, -1.0)
-	P7 = (-1.0, 2.0, -1.0)
-	P8 = ( 0.0, 3.0,  0.0)
-	F = {F0, F1, F2, F3, F4, F5, F6, F7, F8}
-        wall: 
-        F0 = (P0, P1, P5, P4)
-        F1 = (P1, P2, P6, P5) 
-	F2 = (P2, P3, P7, P6)
-	F3 = (P3, P0, P4, P7)
-	ground:
-	F4 = (P0, P3, P2, P1)
-	roof:
-	F5 = (P7, P4, P8)
-	F6 = (P4, P5, P8)
-	F7 = (P5, P6, P8)
-	F8 = (P6, P7, P8)
-        </pre>
-				<br>
-				In the IndexedFaceSet the point set P is defined in the Coordinate node.
-				The set of polygons F is defined in the attribute coordIndex. Each polygon is given by a list of point indices
-				followed by -1 to indicate the end of a polygon and the beginning of a new one.
-				<br>
-				<pre class="prettyprint">
-	&lt;X3D id="shapedata" width="600px" height="600px" style="float:left"&gt;
-	  &lt;Scene&gt;
-	    &lt;Shape&gt;
-   	      &lt;Appearance&gt;
-     	        &lt;Material diffuseColor="0.5 0.5 0.5"&gt; &lt;/Material&gt;
-   	      &lt;/Appearance&gt;
-  	      &lt;IndexedFaceSet solid="true" ccw ="true" 
-   	        coordIndex=" 0 1 5 4 -1 1 2 6 5 -1 2 3 7 6 -1
-                             3 0 4 7 -1 0 3 2 1 -1 7 4 8 -1
-                             4 5 8 -1 5 6 8 -1 6 7 8 -1"&gt;
-   	        &lt;Coordinate point="-1 0 1, 1 0 1, 1 0 -1, -1 0 -1,
-             	            -1 2 1, 1 2 1, 1 2 -1, -1 2 -1, 0 3 0 " &gt; 
-   	        &lt;/Coordinate&gt;
-	      &lt;/IndexedFaceSet&gt;
-	    &lt;/Shape&gt;
-	  &lt;/Scene&gt;
-	&lt;/X3D&gt; 
-        </pre>
-			</td>
-		</tr>
-	</table>
-	<script type="text/javascript" src="x3dom.js"></script>
-</body>
-
-</html>
\ No newline at end of file
+<html>
+
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<title> Indexed Face Set</title>
+	<link rel="stylesheet" type="text/css" href="x3dom.css">
+	</link>
+	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.1/styles/vs.min.css">
+  	<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.1/highlight.min.js"></script>
+  	<script>hljs.highlightAll();</script>
+</head>
+
+<body>
+	<h1> Indexed Face Set </h1>
+	<table width="100%" height="85%" border="0">
+		<tr>
+			<td width="50%" align="center" valign="top" scope="col">
+				<X3D id="shapedata" width="600px" height="600px" style="float:left">
+					<Scene>
+						<Shape>
+							<Appearance>
+								<Material diffuseColor="0.5 0.5 0.5"> </Material>
+							</Appearance>
+							<IndexedFaceSet solid="false" ccw="true" coordIndex=" 0 4 5 1 -1 1 2 6 5 -1 2 3 7 6 -1
+                             3 0 4 7 -1 0 1 2 3 -1 7 4 8 -1
+                             4 5 8 -1 5 6 8 -1 6 7 8 -1  
+					     9 13 14 10 -1 10 11 15 14 -1 11 12 16 15 -1
+                             12 9 13 16 -1 9 10 11 12 -1 16 13 17 -1
+                             13 14 17 -1 14 15 17 -1 15 16 17 -1">
+								<Coordinate point="-1 0 1, 1 0 1, 1 0 -1, -1 0 -1,
+             	            -1 2 1, 1 2 1, 1 2 -1, -1 2 -1, 0 3 0, 
+							2 0 1, 4 0 1, 4 0 -1, 2 0 -1,
+             	            2 2 1, 4 2 1, 4 2 -1, 2 2 -1, 3 3 0 ">
+								</Coordinate>
+							</IndexedFaceSet>
+						</Shape>
+						<!-- add points (as spheres) and labels -->
+						<!-- P0 -->
+						<Transform translation='-1 0 1'>
+							<Shape DEF='Point'>
+								<Appearance DEF='Green'>
+									<Material diffuseColor='0 1 0'> </Material>
+								</Appearance>
+								<Sphere radius="0.1"> </Sphere>
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance DEF='LABEL_APPEARANCE'>
+											<Material diffuseColor='0 0 0'> </Material>
+										</Appearance>
+										<Text string='"P0"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P1 -->
+						<Transform translation='1 0 1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P1"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P2 -->
+						<Transform translation='1 0 -1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P2"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P3 -->
+						<Transform translation='-1 0 -1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P3"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P4 -->
+						<Transform translation='-1 2 1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P4"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P5 -->
+						<Transform translation='1 2 1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P5"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P6 -->
+						<Transform translation='1 2 -1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P6"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P7 -->
+						<Transform translation='-1 2 -1'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 -0.75 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P7"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+						<!-- P8 -->
+						<Transform translation='0 3 0'>
+							<Shape USE="Point">
+							</Shape>
+							<Transform translation='0 0.0 0'>
+								<Billboard>
+									<Shape>
+										<Appearance USE='LABEL_APPEARANCE'>
+										</Appearance>
+										<Text string='"P8"'>
+											<FontStyle DEF='LABEL_FONT' family='"SANS"' justify='"MIDDLE" "MIDDLE"' size='.2'> </FontStyle>
+										</Text>
+									</Shape>
+								</Billboard>
+							</Transform>
+						</Transform>
+					</Scene>
+				</X3D>
+				</p>
+			</td>
+			<td width="50%" align="left" valign="top" scope="col">
+				An IndexedFaceSet is used to define a polygonal shape. For example, it can be used to model a building.
+				The building geometry is given by a set of points P={P0, P1, ..., Pn}
+				and a set of polygons F={F0, F1, ..., Fm}. Each point Pi is given by its coordinates Pi=(xi,yi,zi).
+				Each polygon Fi is defined by a list of m coplanar points (m >=3) given in counterclockwise order:
+				Fi=(Pi0, Pi1, ... Pim)
+				<pre>
+	Example:
+	P = {P0, P1, P2, P3, P4, P5, P6, P7, P8}
+	with
+        P0 = (-1.0, 0.0,  1.0)
+	P1 = ( 1.0, 0.0,  1.0)
+	P2 = ( 1.0, 0.0, -1.0)
+	P3 = (-1.0, 0.0, -1.0)
+        P4 = (-1.0, 2.0,  1.0)
+	P5 = ( 1.0, 2.0,  1.0)
+	P6 = ( 1.0, 2.0, -1.0)
+	P7 = (-1.0, 2.0, -1.0)
+	P8 = ( 0.0, 3.0,  0.0)
+	F = {F0, F1, F2, F3, F4, F5, F6, F7, F8}
+        wall: 
+        F0 = (P0, P1, P5, P4)
+        F1 = (P1, P2, P6, P5) 
+	F2 = (P2, P3, P7, P6)
+	F3 = (P3, P0, P4, P7)
+	ground:
+	F4 = (P0, P3, P2, P1)
+	roof:
+	F5 = (P7, P4, P8)
+	F6 = (P4, P5, P8)
+	F7 = (P5, P6, P8)
+	F8 = (P6, P7, P8)
+        </pre>
+				<br>
+				In the IndexedFaceSet the point set P is defined in the Coordinate node.
+				The set of polygons F is defined in the attribute coordIndex. Each polygon is given by a list of point indices
+				followed by -1 to indicate the end of a polygon and the beginning of a new one.
+				<br>
+				<pre>
+				<code class="language-html">
+&lt;html&gt; 
+&lt;head&gt; 
+    &lt;title&gt;My first X3DOM page&lt;/title&gt; 			
+    &lt;script type='text/javascript' src='http://www.x3dom.org/download/x3dom.js'&gt; &lt;/script&gt; 
+    &lt;link rel='stylesheet' type='text/css' href='http://www.x3dom.org/download/x3dom.css'&gt;&lt;/link&gt; 
+&lt;/head&gt; 
+&lt;body&gt; 
+    &lt;X3D id="shapedata" width="600px" height="600px" style="float:left"&gt;
+        &lt;Scene&gt;
+        &lt;Shape&gt;
+                &lt;Appearance&gt;
+                    &lt;Material diffuseColor="0.5 0.5 0.5"&gt; &lt;/Material&gt;
+                &lt;/Appearance&gt;
+            &lt;IndexedFaceSet solid="true" ccw ="true" 
+                coordIndex=" 0 1 5 4 -1 1 2 6 5 -1 2 3 7 6 -1
+                                3 0 4 7 -1 0 3 2 1 -1 7 4 8 -1
+                                4 5 8 -1 5 6 8 -1 6 7 8 -1"&gt;
+                &lt;Coordinate point="-1 0 1, 1 0 1, 1 0 -1, -1 0 -1,
+                                -1 2 1, 1 2 1, 1 2 -1, -1 2 -1, 0 3 0 " &gt; 
+                &lt;/Coordinate&gt;
+            &lt;/IndexedFaceSet&gt;
+        &lt;/Shape&gt;
+        &lt;/Scene&gt;
+    &lt;/X3D&gt; 
+&lt;/body&gt; 
+&lt;/html&gt;  
+</code>
+</pre>    
+			</td>
+			<script type="text/javascript" src="x3dom.js"></script>
+</body>
+
+</html>