<head>
  <title>Bootsrap Image Gallery</title>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
  <link rel="stylesheet" type="text/css" href="style.css">
  <link rel="shortcut icon" href="favicon.ico"/>
</head>
<body>

  <!-- navbar start -->
  <nav class="navbar navbar-inverse navbar-fixed-top">
    <div class="container">
      <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#alberto" aria-expanded="false">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            </button>
        <a href="#" class="navbar-brand"><span class="glyphicon glyphicon-picture" aria-hidden="true"></span> Syknapse</a>
      </div>

      <div class="collapse navbar-collapse" id="alberto">
        <ul class="nav navbar-nav">
          <li><a href="#">About</a></li>
          <li><a href="#">Contact</a></li>
        </ul>

        <ul class="nav navbar-nav navbar-right">
          <li><a href="#">Sign up</a></li>
          <li><a href="#"><i class="fa fa-user-o" aria-hidden="true"></i> Log in</a></li>
        </ul>
      </div>
    </div>
  </nav>
  <!-- navbar end -->

  <!-- content start -->
  <div class="container">
    
    <div class="jumbotron">
      <h1><i class="fa fa-camera-retro" aria-hidden="true"></i> Lenses</h1>
      <p>Images provided free of copyright by wonderful people</p>
    </div>

    <div class="row flex">

      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/sBvouTuXoAE">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/VQYxQiiRky0">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/gJFvHkUHdSI">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/Bjw6dbIYtNE">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/C52dylsC1-g">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/wsMwDxF8SKA">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/sfze-8LfCXI">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/8oydDuX4AAM">
        </div>
      </div>
      <div class="col-lg-4 col-sm-6">
        <div class="thumbnail">
          <img src="https://source.unsplash.com/PN_c3RKCVlA">
        </div>
      </div>

    </div>

  </div>



<script
  src="https://code.jquery.com/jquery-3.2.1.js"
  integrity="sha256-DZAnKJ/6XZ9si04Hgrsxu/8s717jcIzLy3oi35EouyE="
  crossorigin="anonymous"></script>

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

</body>
body {
  padding-top: 70px;
}

.jumbotron {
  color: #284738;
  background: #dce2df;
}

.navbar-inverse {
  background: #284738;
}

.navbar-inverse .navbar-nav>li>a {
  color: #e0fff0;
}

.navbar-inverse .navbar-brand {
  color: #e0fff0;
}

.flex {
  display: flex;
  flex-wrap: wrap;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.