body,
html {
  height: 100%;
  width: 100%;
}
.parallax {
  /* The image used */
  background-image: url("../pictures/TimelineP.jpg");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 800px;
}

.parallax2 {
  /* The image used */
  background-image: url("../pictures/DSC_2100.jpg");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 800px;
}

.parallax3 {
  /* The image used */
  background-image: url("../pictures/Plane.jpg");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 800px;
}
.parallax4 {
  /* The image used */
  background-image: url("../pictures/DSC_3434.jpg");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 800px;
}