#container {
    width: 1600px;
    height: 900px;
    margin-left: auto;
    margin-right: auto;
    background-color: lightsteelblue;
    position: relative;
}
.background{
    background-color: aquamarine;
}
#img1 {
    left: 5px;
    top: 0;
    position: absolute;
}

#img2 {
    right: 10px;
    position: absolute
}

#img3 {
    left: 860;
    position: relative;
    top: 160px
}

#img4 {
    right: 700;
    position: relative;
    top: 160px
}

#img5 {
    left: 700;
    position: relative;
    bottom:800px;
    width: 256px;
    height:256px;
    
}

#img6 {
    left:200;
    position: relative;
    bottom:800px
}

#img7 {
     left: 60;
    position: relative;
    bottom:800px
}

#img8 {
     left: 60;
    position: relative;
    bottom:800px
}

#img9 {
     left: 600;
    position: relative;
    bottom:1200px;
    bottom: 1050
}

#img10 {
     left: 60;
    position: relative;
    bottom:1495px
}

#img11 {
     left: 200;
    position: relative;
    bottom:1200px
}

#img12 {
     left: 60;
    position: relative;
    bottom:1900px
}