/* https://www.w3schools.com/css/tryit.asp?filename=trycss3_animation1 */
/* #00FF7F - light green */
.blinking_class {
    background-color: red;
    -webkit-animation-name: blink_animation; /* Safari 4.0 - 8.0 */
    -webkit-animation-duration: 4s; /* Safari 4.0 - 8.0 */
    animation-name: blink_animation;
    animation-iteration-count: infinite;
    animation-duration: 3s;
}
/* Safari 4.0 - 8.0 */
@-webkit-keyframes blink_animation {
    from {background-color: white;}
    to {background-color: yellow;}
}

/* Standard syntax */
@keyframes blink_animation {
    from {background-color: yellow;}
    to {background-color: #00FF7F;}
}