.paraxify {
  background-attachment: fixed;
  background-position: center center;
  background-size: cover;
  background-color: rgba(0,0,0,0.5);
}
.foto1{
  background-image:url(http://portaldetorcoroma.com/images/site/contact.jpg);
  background-repeat: no-repeat;
  background-position: center center;
}
.foto2{
  background-image:url(http://portaldetorcoroma.com/images/site/services.jpg);
  background-repeat: no-repeat;
  background-position: center center;
}