Edit in JSFiddle

.box {
    position: absolute;
    left: 50%;
    top: 100px;
    width: 100px;
    height: 100px;
    margin-left: -50px;
    background-color: #000;
    opacity: 0;
    -webkit-animation: fadeInUp .5s linear 2s forwards;
}

@-webkit-keyframes fadeInUp {
    0% {
        opacity: 0;
        top: 130px;
    }
    100% {
        opacity: 1;
        top: 100px;
    }
}

<div class="box"></div>