#boite {
float: left;
width: 100%;
height: 100%;
position: absolute;
  background-color: #FF0000
}
/* Pigeons 1 */
.boite1 {
float: left;
position: absolue;
width: auto;
height: auto;
  background-color: #FF0000

margin-top: 10px;
margin-left: 10px;
}
/* Pigeons 2 */
.boite2 {
float: left;
position: absolute;
width: 230px;
height: 361px;
margin-top: 2px;
margin-left: 450px;
}
/* Pigeons 3 */
.boite3 {
float: left;
position: absolute;
width: 232px;
height: 292px;
margin-top: 380px;
margin-left: 150px;
}
/* Pigeons 4 */
.boite4 {
float: left;
position: absolute;
width: 358px;
height: 177px;
margin-top: 420px;
margin-left: 540px;
}