#notes{
    width: 100%;
    height: 20px;
    position: relative;
    margin-bottom: 10px;
}
.note {
    width: 20%;
    height: 100%;
    position: relative;
    float: left;
    background-color: black;
    opacity: 0;
    transition: opacity 0.5s;
}
.note.active {
    opacity: 1;
    transition-duration: 0.1s;
}