#firstAside {
    float: right;
}

#secondSection {
    position: relative;
}

#secondAside {
    position: absolute;
    bottom: 0;
    right: 0;
}

#thirdAside {
    background-color: green;
    position: fixed;
    top: 0;
    right: 0;
    z-index: 15;
}

#lastSection {
    position: relative;
}

#fifthAside {
    position: absolute;
    background-color: red;
    z-index: 10;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

}

#sixthAside {
    position: absolute;
    background-color: black;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin-top: 10px;
    margin-left: 10px;
    z-index: 5;
}