h1 {
  font-family: 'Open Sans', sans-serif;
  position:fixed;
  top: 50%;
  width: 100%;
  text-align: center;
  color: white;
  text-shadow: 3px 3px 8px black;
}
#section1, #section2, #section3, #section4 {
    min-height: 800px;
}
#section1 {
  background: royalblue;
}
#section2 {
  background: gold;
}
#section3 {
  background: purple;
}
#section4 {
  background: teal;
}