loader.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

#pre-loader {
    height: 100vh;
    width: 100vw;
    position: fixed;
    top: 0;
    z-index: 2000000010;
    background: #000 url(Loader_Animation.gif) no-repeat center center;
    background-size: 30%;
    overflow-y: hidden;
}

#pre-loader h1 {
    background-color: transparent;
    position: absolute;
    top: 70%;
    left: 52%;
    transform: translate(-50%,-50%);
    color: antiquewhite;
    font-size: 3rem;
    letter-spacing: 1.2px;
    animation-name: animate;
    animation-duration: 1.5s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

@keyframes animate {
    0%{
        opacity: 0;
    }
    50%{
        opacity: 1;
    }
    100%{
        opacity: 0;
    }
}