diff --git a/html/pagina1.html b/html/pagina1.html
index 9a868b19..29590fb1 100644
--- a/html/pagina1.html
+++ b/html/pagina1.html
@@ -1,30 +1,38 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
 <HTML>
-	<HEAD>
-		<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
-		<TITLE>Mi primera página</TITLE>
-		<META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
-		<META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CREATED" CONTENT="20020903;6090096">
-		<META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CHANGED" CONTENT="20020903;6133657">
-		<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-	</HEAD>
-	<BODY LANG="es-ES" class="container text-center">
-		<H1>
-			<IMG ID="imagen1" SRC="../imagenes/BD1.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50><BR CLEAR=LEFT><BR><BR>
-		</H1>
-		<H1 ID="titulo1">Mi primera página HTML</H1>
-		<P>
-			<BR><BR>
-		</P>
-		<div class="row text-center">
-			<div class="col-md-6">
-				<span>&larr;</span><A HREF="pagina5.html">Mi quinta página HTML</A>
-			</div>
-			<div class="col-md-6">
-				<A ID="enlace1" HREF="pagina1.html">Mi primera página HTML</A><span>&rarr;</span>
-			</div>
-		</div>
-	</BODY>
+
+<HEAD>
+    <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
+    <TITLE>Mi primera página</TITLE>
+    <META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
+    <META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
+    <META NAME="CREATED" CONTENT="20020903;6090096">
+    <META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
+    <META NAME="CHANGED" CONTENT="20020903;6133657">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
+</HEAD>
+
+<BODY LANG="es-ES" class="container text-center">
+    <H1>
+        <IMG ID="imagen1" SRC="../imagenes/BD1.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50>
+        <BR CLEAR=LEFT>
+        <BR>
+        <BR>
+    </H1>
+    <H1 ID="titulo1">Mi primera página HTML</H1>
+    <P>
+        <BR>
+        <BR>
+    </P>
+    <div class="row text-center">
+        <div class="col-md-6">
+            <span>&larr;</span>
+            <A HREF="pagina5.html">Mi quinta página HTML</A>
+        </div>
+        <div class="col-md-6">
+            <A ID="enlace1" HREF="pagina2.html">Mi segunda página HTML</A><span>&rarr;</span>
+        </div>
+    </div>
+</BODY>
+
 </HTML>
\ No newline at end of file
diff --git a/html/pagina2.html b/html/pagina2.html
index 911dcbd6..c7d4be59 100644
--- a/html/pagina2.html
+++ b/html/pagina2.html
@@ -1,30 +1,38 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
 <HTML>
+
 <HEAD>
-	<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
-		<TITLE>Mi primera página</TITLE>
-		<META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
-		<META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CREATED" CONTENT="20020903;6090096">
-		<META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CHANGED" CONTENT="20020903;6133657">
-		<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-	</HEAD>
-	<BODY LANG="es-ES" class="container text-center">
-		<H1>
-			<IMG ID="imagen2" SRC="../imagenes/BD1.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50><BR CLEAR=LEFT><BR><BR>
-		</H1>
-		<H1 ID="titulo2">Mi primera página HTML</H1>
-		<P>
-			<BR><BR>
-		</P>
-		<div class="row text-center">
-			<div class="col-md-6">
-				<span>&larr;</span><A HREF="pagina1.html">Mi primera página HTML</A>
-			</div>
-			<div class="col-md-6">
-				<A ID="enlace2" HREF="pagina2.html">Mi segunda página HTML</A><span>&rarr;</span>
-			</div>
-		</div>
-	</BODY>
+    <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
+    <TITLE>Mi primera página</TITLE>
+    <META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
+    <META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
+    <META NAME="CREATED" CONTENT="20020903;6090096">
+    <META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
+    <META NAME="CHANGED" CONTENT="20020903;6133657">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
+</HEAD>
+
+<BODY LANG="es-ES" class="container text-center">
+    <H1>
+        <IMG ID="imagen2" SRC="../imagenes/BD2.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50>
+        <BR CLEAR=LEFT>
+        <BR>
+        <BR>
+    </H1>
+    <H1 ID="titulo2">Mi segunda página HTML</H1>
+    <P>
+        <BR>
+        <BR>
+    </P>
+    <div class="row text-center">
+        <div class="col-md-6">
+            <span>&larr;</span>
+            <A HREF="pagina1.html">Mi primera página HTML</A>
+        </div>
+        <div class="col-md-6">
+            <A ID="enlace2" HREF="pagina2.html">Mi segunda página HTML</A><span>&rarr;</span>
+        </div>
+    </div>
+</BODY>
+
 </HTML>
\ No newline at end of file
diff --git a/html/pagina3.html b/html/pagina3.html
index b93a89cb..fdc9ebed 100644
--- a/html/pagina3.html
+++ b/html/pagina3.html
@@ -1,30 +1,35 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
-<HTML>
-	<HEAD>
-		<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
-			<TITLE>Mi primera página</TITLE>
-			<META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
-			<META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
-			<META NAME="CREATED" CONTENT="20020903;6090096">
-			<META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
-			<META NAME="CHANGED" CONTENT="20020903;6133657">
-			<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-		</HEAD>
-	<BODY LANG="es-ES" class="container text-center">
-		<H1>
-			<IMG ID="imagen3" SRC="../imagenes/BD1.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50><BR CLEAR=LEFT><BR><BR>
-		</H1>
-		<H1 ID="titulo3">Mi primera página HTML</H1>
-		<P>
-			<BR><BR>
-		</P>
-		<div class="row text-center">
-			<div class="col-md-6">
-				<span>&larr;</span><A HREF="pagina2.html">Mi segunda página HTML</A>
-			</div>
-			<div class="col-md-6">
-				<A ID="enlace3" HREF="pagina2.html">Mi segunda página HTML</A><span>&rarr;</span>
-			</div>
-		</div>
-	</BODY>
-</HTML>
\ No newline at end of file
+<!DOCTYPE html><html><head>
+    <meta http-equiv="CONTENT-TYPE" content="text/html; charset=UTF-8">
+    <title>Mi primera página</title>
+    <meta name="GENERATOR" content="OpenOffice.org 1.0  (Win32)">
+    <meta name="AUTHOR" content="Gloria Cortés">
+    <meta name="CREATED" content="20020903;6090096">
+    <meta name="CHANGEDBY" content="Gloria Cortés">
+    <meta name="CHANGED" content="20020903;6133657">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
+</head>
+
+<body lang="es-ES" class="container text-center">
+    <h1>
+        <img id="imagen3" src="../imagenes/BD3.gif" name="Imagen1" align="CENTER" width="700" height="50">
+        <br clear="LEFT">
+        <br>
+        <br>
+    </h1>
+    <h1 id="titulo3">Mi tercera página HTML</h1>
+    <p>
+        <br>
+        <br>
+    </p>
+    <div class="row text-center">
+        <div class="col-md-6">
+            <span>←</span>
+            <a href="pagina2.html">Mi segunda página HTML</a>
+        </div>
+        <div class="col-md-6">
+            <a id="enlace3" href="pagina4.html">Mi cuarta página HTML</a><span>→</span>
+        </div>
+    </div>
+
+
+</body></html>
\ No newline at end of file
diff --git a/html/pagina4.html b/html/pagina4.html
index 73dc1484..3363113a 100644
--- a/html/pagina4.html
+++ b/html/pagina4.html
@@ -1,30 +1,34 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
-<HTML>
-	<HEAD>
-		<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
-		<TITLE>Mi primera página</TITLE>
-		<META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
-		<META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CREATED" CONTENT="20020903;6090096">
-		<META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CHANGED" CONTENT="20020903;6133657">
-		<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-	</HEAD>
-	<BODY LANG="es-ES" class="container text-center">
-		<H1>
-			<IMG ID="imagen4" SRC="../imagenes/BD1.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50><BR CLEAR=LEFT><BR><BR>
-		</H1>
-		<H1 ID="titulo4">Mi primera página HTML</H1>
-		<P>
-			<BR><BR>
-		</P>
-		<div class="row text-center">
-			<div class="col-md-6">
-				<span>&larr;</span><A HREF="pagina3.html">Mi tercera página HTML</A>
-			</div>
-			<div class="col-md-6">
-				<A ID="enlace4" HREF="pagina2.html">Mi segunda página HTML</A><span>&rarr;</span>
-			</div>
-		</div>
-	</BODY>
-</HTML>
\ No newline at end of file
+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta http-equiv="CONTENT-TYPE" content="text/html; charset=UTF-8">
+    <title>Mi primera página</title>
+    <meta name="GENERATOR" content="OpenOffice.org 1.0  (Win32)">
+    <meta name="AUTHOR" content="Gloria Cortés">
+    <meta name="CREATED" content="20020903;6090096">
+    <meta name="CHANGEDBY" content="Gloria Cortés">
+    <meta name="CHANGED" content="20020903;6133657">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
+</head>
+
+<body lang="es-ES" class="container text-center">
+    <h1>
+        <img id="imagen4" src="../imagenes/BD4.gif" name="Imagen1" align="CENTER" width="700" height="50"><br clear="LEFT"><br><br>
+    </h1>
+    <h1 id="titulo4">Mi cuarta página HTML</h1>
+    <p>
+        <br><br>
+    </p>
+    <div class="row text-center">
+        <div class="col-md-6">
+            <span>←</span><a href="pagina3.html">Mi tercera página HTML</a>
+        </div>
+        <div class="col-md-6">
+            <a id="enlace4" href="pagina5.html">Mi quinta página HTML</a><span>→</span>
+        </div>
+    </div>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/html/pagina5.html b/html/pagina5.html
index e57c377f..4a9c4d40 100644
--- a/html/pagina5.html
+++ b/html/pagina5.html
@@ -1,31 +1,36 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
-<HTML>
-	<HEAD>
-		<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=UTF-8">
-		<TITLE>Mi primera página</TITLE>
-		<META NAME="GENERATOR" CONTENT="OpenOffice.org 1.0  (Win32)">
-		<META NAME="AUTHOR" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CREATED" CONTENT="20020903;6090096">
-		<META NAME="CHANGEDBY" CONTENT="Gloria Cort&eacute;s">
-		<META NAME="CHANGED" CONTENT="20020903;6133657">
-		<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-	</HEAD>
-	<BODY LANG="es-ES" class="container text-center">
-		<H1>
-			<IMG ID="imagen5" SRC="../imagenes/BD1.gif" NAME="Imagen1" ALIGN=CENTER WIDTH=700 HEIGHT=50><BR CLEAR=LEFT><BR><BR>
-		</H1>
-		<H1 ID="titulo5">Mi primera página HTML</H1>
-		<P>
-			<BR><BR>
-		</P>
-		<div class="row text-center">
-			<div class="col-md-6">
-				<span>&larr;</span><A HREF="pagina4.html">Mi cuarta página HTML</A>
-			</div>
-			<div class="col-md-6">
-				<A ID="enlace5" HREF="pagina2.html">Mi segunda página HTML</A><span>&rarr;</span>
-			</div>
-		</div>
-		<P></P>
-	</BODY>
-</HTML>
\ No newline at end of file
+<!DOCTYPE html><html><head>
+    <meta http-equiv="CONTENT-TYPE" content="text/html; charset=UTF-8">
+    <title>Mi primera página</title>
+    <meta name="GENERATOR" content="OpenOffice.org 1.0  (Win32)">
+    <meta name="AUTHOR" content="Gloria Cortés">
+    <meta name="CREATED" content="20020903;6090096">
+    <meta name="CHANGEDBY" content="Gloria Cortés">
+    <meta name="CHANGED" content="20020903;6133657">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
+</head>
+
+<body lang="es-ES" class="container text-center">
+    <h1>
+        <img id="imagen5" src="../imagenes/BD5.gif" name="Imagen1" align="CENTER" width="700" height="50">
+        <br clear="LEFT">
+        <br>
+        <br>
+    </h1>
+    <h1 id="titulo5">Mi quinta página HTML</h1>
+    <p>
+        <br>
+        <br>
+    </p>
+    <div class="row text-center">
+        <div class="col-md-6">
+            <span>←</span>
+            <a href="pagina4.html">Mi cuarta página HTML</a>
+        </div>
+        <div class="col-md-6">
+            <a id="enlace5" href="pagina1.html">Mi primera página HTML</a><span>→</span>
+        </div>
+    </div>
+    <p></p>
+
+
+</body></html>
\ No newline at end of file
