@charset "utf-8";

#block_1, #block_2, #block_3, #block_4 {
    position: relative;
    width: 400px;
}

#block_1 {
    background-color: green;
    left: 400px;
}

#block_2 {
    background-color: blue;
    right: 50px;
}

#block_3 {
    background-color: red;
    top: 100px;
    left: 200px;
}

#block_4 {
    background-color: yellow;
    bottom: 30px;
}