body {

.bg-image1 {
  background-image: url('../img/photo1.png');
  background-repeat: no-repeat;
  background-size: cover;
          }

.bg-image2 {
  background-image: url('../img/photo6.png');
  background-repeat: no-repeat;
  background-size: cover;
          }

.bg-image3 {
  background-image: url('../img/photo3.png');
  background-repeat: no-repeat;
  background-size: cover;
          }

}