div {
    width: 20rem;
    height: 20rem;
    padding: 20px;
    color: #ffffff;
}

.color-red {
    background-color: red
}
.relative {
    position: relative
}
.absolute {
    position: absolute;
    top: 0;
    left: 0;
}
.absolute2 {
    position: absolute;
    top: 50%;
    right: 5rem;
}
.contenedor {
    position: relative;
}