body {
  text-align: center;
  background-image: url(bg_imgs/clouds.jpg);
  background-size: 100% 100%;
  background-attachment: fixed;
}
div {
  margin: 0px 10px;
  background-color: #cac1f7;
}
#boxB {
 margin:0% 20%;
 background-color: #e3effa;
}
img {
  width:50%;
  height:50%;
}