body {
    background-image: url(img/bg_tile.png);
    background-repeat: repeat;
}

h1 {
    color: bisque;
    text-align: center;
    font-size: 4em;
    font-family: "Comic Sans MS", "Comic Sans", cursive;

    -webkit-text-stroke-width: 3px;
    -webkit-text-stroke-color: black;

    text-shadow: #FC0 1px 0 10px;
}

img {
    border: 5px dotted white;
}


@keyframes blink { 
    50% { border: 5px dotted salmon; } 
 }
 img{ /*or other element you want*/
     animation: blink .5s step-end infinite alternate;
 }