#welcome {
    color: black;
    font-size: 300%;
    font-family: "Computer Modern", serif;

    position: absolute;
    top: 200px;
    width: 100%;
    text-align: center;

    animation: fadeInOut 3s;
    animation-fill-mode: forwards;
}
@keyframes fadeInOut {
    0% {opacity: 0;}
    50% {opacity: 1;}
    100% {opacity: 0;}
}