image float

<style>

#float {
animation-name: floating;
animation-duration: 3s;
animation-iteration-count: infinite;
animation-timing-function: ease-in-out;
}

@keyframes floating {
0% { transform: translate(0, 0px); }
50% { transform: translate(0, 15px); }
100% { transform: translate(0, -0px); }
}

</style>
<div id="float">
<img src="Your Image Here">
</div>