.classDescripton {
    animation: slide 3s ease-in-out infinite alternate;
    background-image: linear-gradient(-60deg, #6c3 50%, #09f 50%);
    bottom: 0;
	height: 100%;
	margin: 0px;
    overflow: hidden;
    opacity: .5;
	padding: 0px;
	position: absolute;
	top: 0;
    width: 100%; 
	z-index: -1;
}

.bg2 {
    animation-direction: alternate-reverse;
    animation-duration: 4s;
}

.bg3 {
    animation-duration: 5s;
}

.classContent {
    background-color: rgba(255,255,255,.8);
    border-radius: .25em;
    box-shadow: 0 0 .25em rgba(0,0,0,.25);
    box-sizing: border-box;
    left: 50%;
    padding: 10vmin;
    position: fixed;
    text-align: center;
    top: 50%;
    transform: translate(-50%, -50%);
}

@keyframes slide {
  0% {
    transform: translateX(-25%);
  }
  100% {
    transform: translateX(25%);
  }
}