@media (min-width: 768px) {
  .backgroundimages {
    height: 500px;
    width: 100%;
    font-size: 10px;
  }
}

@media (max-width: 767px) {
  .backgroundimages {
    width: 100%;
    height: 320px;
    background-position: center;
    background-size: cover;
  }
}

@media (min-width: 1500px) {
  .backgroundimages {
    width: 100%;
    height: 500px;
    background-position: center;
    background-size: cover;
  }
}