[ksa]

Как вариант "убирать" меняя размеры в ноль...

<style>
.container {
	display: inline-block;
	padding: 10px;
	background-color: silver;
}
#rybak {
	animation: show 5s ease 1s, hide 3s ease 5s; 
	animation-fill-mode: forwards; 
	opacity:0;
 } 
@keyframes show{
	0%{
		opacity:0;
	}
	100% {
		opacity:1;
	}
}
@keyframes hide{
	0%{
		opacity:1;
	}
	99% {
		opacity:0;
	}
	100% {
		width:0;
		height:0;
	}
}

</style>
<div class='container'>
	<img id='rybak' src='https://javascript.ru/forum/images/ca_serenity/misc/logo.gif' />
</div>