SOURCE

<span class="text">Hello world</span>
<img class="img" src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fwww.08lr.cn%2Fuploads%2Fallimg%2F170513%2F1-1F513164126.jpg&refer=http%3A%2F%2Fwww.08lr.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1614342078&t=573647a01fca7ff9b16298550fa909ce" />

.text{
    position: absolute;
    height:20px;
    line-height: 20px;
    font-size: 18px;
    background: #ff0000;
}

.img{
    width:200px;
    animation: animation .5s;
}

@keyframes animation
{
    from {opacity: 0;}
    to {opacity: 1;}
}