body {
    font-size: 40px;
    background-color: black;
    color: white;
}
.white {
    position: absolute;
    top: auto;
    right: 50px;
    bottom: 100px;
    left: 50%;
    height: 100px;
    background-color: white;
    border-radius: 10px;
}

.red {
    background-color: red;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    bottom: 50px;
    left: 100px;
}