body {
    background-color: green;
    text-align: center;
}
.container {
    position: relative;
    width: 400px;
    margin: 20% auto;
}
.white-keys, .black-keys {
    width: 100%;
    position: absolute;
}
.white-keys kbd {
    display: inline-block;
    width: 10%;
    padding: 130px 0 60px;
    border: 2px solid gray;
    background-color: #FFF;
}
.black-keys kbd {
    position: absolute;
    display: inline-block;
    width: 7%;
    padding: 70px 0 30px;
    background-color: #000;
    color: #fff;
}
#W {
    left: 16%;
}
#E {
    left: 28.5%;
}
#T {
    left: 52.5%;
}
#Y {
    left: 64.5%;
}
#U {
    left: 76.5%;
}