CSS

css animation image up and down

div {
    -webkit-animation: action 1s infinite  alternate;
    animation: action 1s infinite  alternate;
}

@-webkit-keyframes action {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

@keyframes action {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}