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CSS

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JavaScript

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HTML 

              
                <!-- Inicio de la página web portafolio jbeta58 -->
<!-- Atributos en body para característica Scrollspy -->

<body data-spy="scroll" data-target="#menu1" data-offset="70">
    <!-- Barra de navegación -->
    <nav class="navbar navbar-expand-md fixed-top navbar-dark bg-secondary">
      <div class="container">
        <!-- Logo de la barra de navegación -->
        <a class="navbar-brand" href="#"><b>@jbeta58</b></a>
        <!-- Fin Logo de la barra de navegación -->
        <!-- Botón para colapsar barra de navegación -->
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#menu1" aria-controls="menu1" aria-expanded="false" aria-label="Toggle navigation">
              <span class="navbar-toggler-icon"></span>
        </button>
        <!-- Botón para colapsar barra de navegación -->
        <!-- Botones de navegación -->
        <div class="collapse navbar-collapse" id="menu1">
          <div class="nav navbar-nav ml-auto mr-auto text-center">
            <a class="nav-link btn btn-secondary mx-2 my-1" role="button" href="#About">About</a>
            <a class="nav-link btn btn-secondary mx-2 my-1" role="button" href="#Projects">Projects</a>
            <a class="nav-link btn btn-secondary mx-2 my-1" role="button" href="#Contact">Contact</a>
          </div>
          <!-- Fin botones de navegación -->
          <!-- Botones de Redes Sociales Superiores -->
          <div class="d-flex flex-row justify-content-center">
            <a class="btn btn-social-icon btn-twitter" href="https://twitter.com/jbeta58" target="_blank">
              <span class="fa fa-twitter-square fa-2x"></span>
            </a>
            <a class="btn btn-social-icon btn-facebook" href="https://facebook.com/jbeta58" target="_blank">
              <span class="fa fa-facebook-square fa-2x"></span>
            </a>
            <a class="btn btn-social-icon btn-linkedin" href="https://linkedin.com/in/jbeta58" target="_blank">
              <span class="fa fa-linkedin-square fa-2x"></span>
            </a>
            <a class="btn btn-social-icon btn-youtube" href="https://youtube.com/jbeta58" target="_blank">
              <span class="fa fa-youtube-square fa-2x"></span>
            </a>
          </div>
          <!-- Fin de botones de Redes Sociales Superiores -->
        </div>
      </div>
    </nav>
    <!-- Fin de la barra de navegación -->
    <!-- Sección About -->
    <div id="About" class="bg-inicio mt-5 d-flex flex-row justify-content-end align-items-center">
      <!-- El siguiente div desaparece cuando se cambia de tamaño md hacia abajo -->
      <div class="col-6 border text-right mr-5 p-4 bg-white rounded bg-opaco d-none d-md-block">
        <h1><strong>Juan Sebastián Betancourt Tabares</strong></h1>
        <h4>Electronic Engineer / MBA & Finance /</h4>
        <h4>Aspiring Web Developer</h4>
        <hr>
        <p class="text-justify">I have nine years of professional experience implementing team-based projects and improvements in operational, administrative and financial processes in construction companies.</p>
        <p class="text-justify">I'm also studying a Data Analysis Specialization in Coursera.org and self-learning Web Development (HTML, CSS, JavaScript, Ruby on Rails, among others).</p>
      </div>
    </div>
    <!-- El siguiente div aparece cuando se cambia de tamaño md hacia abajo -->
    <div class="container-fluid text-center mr-5 p-4 bg-white rounded bg-opaco d-md-none">
      <h1><strong>Juan Sebastián Betancourt Tabares</strong></h1>
      <h4>Electronic Engineer /</h4>
      <h4>MBA & Finance /</h4>
      <h4>Aspiring Web Developer</h4>
      <hr>
      <p class="text-justify">I have nine years of professional experience implementing team-based projects and improvements in operational, administrative and financial processes in construction companies.</p>
        <p class="text-justify">I'm also studying a Data Analysis Specialization in Coursera.org and self-learning Web Development (HTML, CSS, JavaScript, Ruby on Rails, among others).</p>
    </div>
    <!-- Fin de sección About -->
    <!-- Sección Projects -->
    <div id="Projects" class="container-fluid bg-light">
      <div class="container py-5">
        <h1 class="pt-5"><b>Projects</b></h1>
        <h5 class="">Take a look at some of my recent work.</h5>
        <div class="row mt-4">
          <div class="col-12 col-md-4 my-3">
            <img src="http://res.cloudinary.com/jbeta58/image/upload/v1505434329/Casablanca_aa0ydk.jpg" class="img-fluid img-thumbnail">
          </div>
          <div class="col-12 col-md-4 my-3">
            <img src="http://res.cloudinary.com/jbeta58/image/upload/v1505434348/Back-to-the-Future-Honest-Trailer_m8v3ys.jpg" class="img-fluid img-thumbnail">
          </div>
          <div class="col-12 col-md-4 my-3">
            <img src="http://res.cloudinary.com/jbeta58/image/upload/v1505434347/Godfather_wczucx.png" class="img-fluid img-thumbnail">
          </div>
        </div>
        <div class="row">
          <div class="col-12 col-md-4 my-3">
            <img src="http://res.cloudinary.com/jbeta58/image/upload/v1505434341/Shawshank-redemption-hero_d1q6b0.jpg" class="img-fluid img-thumbnail">
          </div>
          <div class="col-12 col-md-4 my-3">
            <img src="http://res.cloudinary.com/jbeta58/image/upload/v1505434341/Schindler-List_epsrfv.jpg" class="img-fluid img-thumbnail">
          </div>
          <div class="col-12 col-md-4 my-3">
            <img src="http://res.cloudinary.com/jbeta58/image/upload/v1505434338/OrangeClockWork_g1gen9.jpg" class="img-fluid img-thumbnail">
          </div>
        </div>
      </div>
    </div>
    <!-- Fin de sección Projects -->
    <!-- Sección Contact -->
    <div id="Contact" class="container-fluid py-5">
      <div class="container pt-4">
        <h1 class=""><b>Contact</b></h1>
        <h5 class="">Feel free to contact me for quotes or any inquiries.</h5>
        <form class="mt-5">
          <div class="form-row">
            <div class="form-group col-md-6">
              <label for="InputFirstName">First Name</label>
              <input type="text" class="form-control" id="InputlFirstName" placeholder="Enter your first name">
            </div>
            <div class="form-group col-md-6">
              <label for="InputLastName">Last Name</label>
              <input type="text" class="form-control" id="InputLastName" placeholder="Enter your last name">
            </div>
          </div>
          <div class="form-row">
            <div class="form-group col-md-6">
              <label for="InputEmail">Email address</label>
              <input type="email" class="form-control" id="InputEmail" aria-describedby="emailHelp" placeholder="Enter your email">
              <small id="emailHelp" class="form-text text-muted">I'll never share your email or phone number with anyone else.</small>
            </div>
            <div class="form-group col-md-6">
              <label for="InputPhoneNumber">Phone number</label>
              <input type="text" class="form-control" id="InputPhoneNumber" placeholder="Enter your phone number">
            </div>
          </div>
          <div class="form-group">
            <label for="FormControlTextarea">Message</label>
            <textarea class="form-control" id="FormControlTextarea" rows="3"></textarea>
          </div>
          <button type="submit" class="btn btn-dark">Send</button>
        </form>
      </div>
    </div>
    <!-- Fin de sección Contact -->
    <!-- Footer -->
    <footer class="bg-secondary text-center text-white py-3">
      <h6 class="py-3">© 2017 jbeta58. All rights reserved.</h6>
      <!-- Botones de Redes Sociales Inferiores -->
      <nav>
        <div class "d-flex flex-row justify-content-center">
          <a class="btn btn-social-icon btn-twitter fa fa-twitter-square fa-2x" href="https://twitter.com/jbeta58" target="_blank">
          </a>
          <a class="btn btn-social-icon btn-facebook fa fa-facebook-square fa-2x" href="https://facebook.com/jbeta58" target="_blank">
          </a>
          <!---->
          <a class="btn btn-social-icon btn-linkedin fa fa-linkedin-square fa-2x" href="https://linkedin.com/in/jbeta58" target="_blank">
          </a>
          <a class="btn btn-social-icon btn-youtube fa fa-youtube-square fa-2x" href="https://youtube.com/jbeta58" target="_blank">
          </a>
        </div>
      </nav>
      <!-- Fin de botones de Redes Sociales Inferiores -->
    </footer>
    <!-- Fin Footer -->
</body>
<!-- Fin de la página web portafolio jbeta58 -->
!

CSS 

              
                body {
    position: relative;
}
.bg-inicio{
  background-image: url("http://res.cloudinary.com/jbeta58/image/upload/e_art:audrey/v1505357278/Foto-fondo-Sebas_y8r7if.jpg");
  -webkit-background-size:cover;
  -moz-background-size:cover;
  -o-background-size:cover;
  background-size: cover;
  backgorund-position: center;
  background-repeat: no-repeat;
  height: 550px;
}
.bg-opaco {
  opacity: 0.7;
}
.fa-youtube-square {
  color: #ffffff;
}
.fa-linkedin-square {
  color: #ffffff;
}
.fa-twitter-square {
  color: #ffffff;
}
.fa-facebook-square {
  color: #ffffff;
}
.fa:hover {
    opacity: 0.5;
    color: #e0e1e2;
}
!

JS
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999px

Console