<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
</head>
<body>
<div id="first" class="container-fluid"></div>
<div id="second" class="container-fluid"></div>
<div style="height:1000px;background-color:black;"></div>
</body>
</html>
#first {
background-image: url("assets/123.png");
min-height: 2400px;
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
#second {
background-image: url("assets/123_2.png");
min-height: 1200px;
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
