<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<title>Libras </title>
<meta charset="utf-8">
<style>
#imagem1 {
width:100%;height:400px;}
h1 { color:white;
}
#tituloPrincipal {background-color:green;}
#imagem2 {
width:30%;height:020px;}
