body{

    background-color: black;

}

.centered{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    height: 480px;
    width: 640px;
    background-color:white;

}

.codeBlock{

margin: -2px;
position: absolute;
font-family: monospace;
font-size: 10pt;
}