#jdcdiv {
 float: left;
 margin: 5px;
 padding: 15px;
 max-width: 300px;
 height: 300px;
 border: 1px solid black;
} 
h2 {
    color: blue;
}


#myDIV {
    max-width: 300px;
    background: grey;
    -webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */
    animation: mymove 5s infinite;
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
    from {background-color: grey;}
    to {background-color: white;}
}

/* Standard syntax */
@keyframes mymove {
    from {background-color: grey;}
    to {background-color: white;}
}