* {
    /* margin: 0;
    padding: 0; */
    box-sizing: border-box;
}


div {
    width: 200px;
    height: 200px;
    font-size: 30px;
    font-weight: bold;
    color: #fff;
}

.box1 {
    margin-top: 15px;
    background: #0f0;
}
.box2 {
    margin-top: 15px;
    background: #0ff;
    /* position: fixed; */
    /* top: 215px; */
    /* left: 400px; */
}
.box3 {
    margin-top: 15px;
    background: #ff0;
    /* position: sticky;
    top: 40px; */
}
.box4 {
    margin-top: 15px;
    background: #f00;
    /* position: static; */
    /* position: relative;
    left: 100px;
    top: 100px; */
    position: absolute;
    top: 100px;
    z-index:3;
}
.box5 {
    margin-top: 15px;
    background: pink;
    /* position: relative; */

}
.box6 {
    margin-top: 15px;
    background: #00f;
}
.box7 {
    margin-top: 15px;
    background: orange;
}
.box8 {
    margin-top: 15px;
    background: orange;
}
.box9 {
    margin-top: 15px;
    background: orange;
    position: absolute;
    top: 100px;
    z-index: 99;
}

#box {
    width: 800px;
    height: 100%;
    border: 2px solid #00f;
    position: relative;
    margin-top: 300px;
    background-color: rgb(215, 37, 255);
}