body {
    background: whitesmoke;
}
#myImage {
    width="500px";
    height="300px";
    display:block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
}
#tab {
    position: absolute;
    top: 60%;
    left: 48%;
    cursor: pointer;
    width: 100px;
}
#head{
    text-align: center;
    font-family: Courier New;
}