.box{
    position: static
}

.box2{
    position: relative;
    left: 15px;
    top:15px;
}

.box3{
    position: Absolute;
    left: 15px;
    top:15px;
}

.footer{
    position: fixed;
    bottom: 0;
    left:0;
    right:0;
}

.footer{
    position: fixed;
    bottom: 0;
    left:0;
    right:0;
}