body, html {
   background-color: black;
   height: 100%;
   margin: 0;
   width: 100vw;
   overflow-y: overlay;
   overflow-x: hidden;
}

.bg {
    background-image: url("../img/gif/illumination.gif");
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
  }
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 20%;
  opacity: 0.5;
}