body {
    background-color:black;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%) 
    /*display: flex;
    align-items: center;
    justify-content: center; */

}

#clock {
    color: rgb(0, 255, 0);
    font-family: courier, monospace;
    font-size: 250px;
    font-weight: 900;
    text-shadow: 0px 0px 50px #00a2ff;
}