#boite {
float: left;
width: 100%;
height: 100%;
position: absolute;
}

/* Back */
.boite1 {
float: left;
position: absolute;
width: 274px;
height: 160px;
margin-top: 280px;
margin-left:300px;
}

.boite2 {
float: left;
position: 260px;
height: 150px;
margin-top: 400px;
margin-left:500px;
}

.boite3 {
float: left;
position: absolute;
width: 233px;
height: 135px;
margin-top: 460px;
margin-left:60px;
}

.boite4 {
float: left;
position: absolute;
width: 359px;
height: 200px;
margin-top: 60px;
margin-left:20px;
}
.boite5 {
float: left;
position: absolute;
width: 328px;
height: 190px;
margin-top: 00px;
margin-left:360px;
}
.boite6 {
float: left;
position: absolute;
width: 400px;
height: 232px;
margin-top: 160px;
margin-left:670px;
}
.boite7 {
float: left;
position: absolute;
width: 300px;
height: 173px;
margin-top: 620px;
margin-left : 275px;
}
.boite8 {
float: left;
position: absolute;
width: 320px;
height: 180px;
margin-top: 560px;
margin-left:660px;
}

.boite9 {
float: left;
position: absolute;
width: 200px;
height: 112px;
margin-top: 430px;
margin-left:900px;
}
.boite10 {
float: left;
position: absolute;
width: 250px;
height: 141px;
margin-top: 660px;
margin-left:0px;
}
.boite11 {
float: left;
position: absolute;
width: 250px;
height: 147px;
margin-top: 800px;
margin-left : 375px;
}
.boite12 {
float: left;
position: absolute;
width: 350px;
height: 207px;
margin-top: 730px;
margin-left:800px;
}