html {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
}

body {
    height: 100%;
    width: 100%;
    background-image: url("img/BG/blackstar.jpg");
    background-repeat: repeat;
    background-size: 300px 300px;
    animation: staranimation 20s linear infinite;
}

@keyframes staranimation {
    0% {
        background-position: 0 0;
    }

    100% {
        background-position: 300px 300px;
    }

    /* Adjust values for desired movement */
}

#centerpanel {
    margin: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    background-color: #DCCFECdd;
    width: 70%;
    height: 70%;
    border-radius: 15px;
    border-style: solid;
    border-color: #70566D;
    border-width: 5px;
}