body{
  background-image: url("../../img/office/day.jpg");
  background-position: center center;
  background-repeat: no-repeat; 
  background-attachment: fixed;
  background-size: cover;
}

.firefly_size{
  position:absolute;
  top:22%;
  left:60%;
  transform: translate(-50%,-50%);
  width: 1.5%;
  height: auto;
  display: none;
}