.container {
-webkit-transition: all 500ms ease;
-moz-transition: all 500ms ease;
-ms-transition: all 500ms ease;
-o-transition: all 500ms ease;
transition: all 500ms ease;
}
div {
background-image: url(01.png), url(z.jpg);
background-size: 100% 100%, cover;
}
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
в шапку.