body {
  background-attachment: fixed;
  background-image: url("https://diytaqpk2k7n5.cloudfront.net/themes/test_testing-theme-create-one-72432/images_15/bg-trans-1920x1080_15.png");
  background-position: center center;
  background-repeat: no-repeat;
  min-height: 100%;
  position: relative;
  background-size: cover;
}