.carousel1 {
  background-image:  url("../images/carousels/1.jpg");
}
.carousel2 {
  background-image: url("../images/carousels/2.jpg");
}
.carousel3 {
  background-image: url("../images/carousels/3.jpg");
}
.carousel4 {
  background-image: url("../images/carousels/4.jpg");
}