<!DOCTYPE html>
<html>
<head>
<title>Titre du document</title>
<style>
body,
html {
height: 100%;
margin: 0;
font-family: Helvetica, sans-serif;
}
.image {
height: 50%;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.one {
background-image: url("https://images.unsplash.com/photo-1523240795612-9a054b0db644?ixlib=rb-1.2.1&auto=format&fit=crop&w=1050&q=80");
}
.two {
background-image: url("https://images.unsplash.com/photo-1501504905252-473c47e087f8?ixlib=rb-1.2.1&auto=format&fit=crop&w=967&q=80");
}
.three {
background-image: url("https://images.unsplash.com/photo-1521737604893-d14cc237f11d?ixlib=rb-1.2.1&auto=format&fit=crop&w=1063&q=80");
}
.four {
background-image: url("https://images.unsplash.com/photo-1519389950473-47ba0277781c?ixlib=rb-1.2.1&auto=format&fit=crop&w=1050&q=80");
}
.five {
background-image: url("https://images.unsplash.com/photo-1522071820081-009f0129c71c?ixlib=rb-1.2.1&auto=format&fit=crop&w=1050&q=80");
}
.six {
background-image: url("https://images.unsplash.com/photo-1488190211105-8b0e65b80b4e?ixlib=rb-1.2.1&auto=format&fit=crop&w=1500&q=80");
}
.seven {