<div class="container">
  <section data-bg-parallax="true"></section>
  <section>
    <p>Kodhus BG Parallax</p>
  </section>
  <section data-bg-parallax="true"></section>
  <section>
    <p>Easily customizable</p>
  </section>
  <section data-bg-parallax="true"></section>
  <section>
    <p>Cool effect</p>
  </section>
</div>
body {
  margin: 0;
}

section {
  position: relative;
  height: 300px;
  box-sizing: border-box;
}
section:not(.header) p {
  position: absolute;
  left: 50%;
  top: 50%;
  font-size: 20px;
  transform: translate(-50%, -50%);
  margin: 0;
}
section:nth-child(1) {
  height: 400px;
  background-image: url('https://nordic.businessinsider.com/contentassets/333b308d7a2247588b93e6c11ee29fc1/xc60_volvocars.jpg?preset=article-image');
  background-size: 130%;
  background-repeat: no-repeat;
  backgrount-position: center 0;
  
}
section:nth-child(3) {
  background-image: url('https://f.nordiskemedier.dk/23odlbmkevjsq0bb.jpg');
  background-size: 130%;
  backgrount-position: center 0;
  background-repeat: no-repeat;
}
section:nth-child(5) {
  background-image: url('https://nordic.businessinsider.com/contentassets/333b308d7a2247588b93e6c11ee29fc1/xc60_volvocars.jpg?preset=article-image');
  background-size: 130%;
  backgrount-position: center 0;
  background-repeat: no-repeat;
}
@media screen and (max-width: 420px) {
  section.header {
    width: 100%;
    height: 220px;
  }
  section:not(.header) p {
    font-size: 30px;
  }
}