#escaliers{
    position: relative;
    width: 1000px;
    height: 1000px;
        }

#escaliers div{
    width: 100px;
    height: 20px;
    margin-top: 0px;
    position: absolute;
}


#marche1 {
    background: red ;
    top: 0px;
    margin-left: 0px;
}
#marche2 {
    background: orange ;
    top: 20px;
    left: 30px;
}
#marche3 {
    background: yellow;
    top: 40px;
    left: 60px;
}
#marche4 {
    background: #99ff33;
    top: 60px;
    left: 90px;
}
#marche5 {
    background: lime;
    top: 80px;
    left: 120px;
}
#marche6 {
    background: #00ffcc ;
    top: 100px;
    left: 140px;
}
#marche7 {
    background: #33ffff ;
    top: 120px;
    left: 160px;
}
#marche8 {
    background: #1aa3ff;
    top: 140px;
    left: 180px;
}
#marche9 {
    background: #0066ff ;
    top: 160px;
    left: 200px;
}
#marche10 {
    background: #944dff;
    top: 180px;
    left: 220px;
}
#marche11 {
    background: #7300e6 ;
    top: 200px;
    left: 240px;
}
#marche12 {
    background: #3d0099;
    top: 220px;
    left: 260px;
}