themechanger.css

body{
    margin: 0;
    padding: 0;
}

#box1{
    border-radius: 0px;
    background: yellow;
    box-shadow:  5px 5px 10px #bebebe,
                 -5px -5px 10px #ffffff;

                 width: 160px;
                 height: 160px;
                 position: relative;
                 left: 83vh;    
                 top: 10vh;
}

#box2{
    border-radius: 0px;
    background: greenyellow;
    box-shadow:  5px 5px 10px #bebebe,
                 -5px -5px 10px #ffffff;

                 width: 160px;
                 height: 160px;
                 position: relative;
                 left: 83vh;    
                 top: 8.5vh;
                }

#box3{
    border-radius: 0px;
    background: red;
    box-shadow:  5px 5px 10px #bebebe,
                 -5px -5px 10px #ffffff;

                 width: 160px;
                 height: 160px;
    position: relative;
    left: 110vh;    
    bottom: 20vh;
}

#box4{
    border-radius: 0px;
    background: blue;
    box-shadow:  5px 5px 10px #bebebe,
                 -5px -5px 10px #ffffff;

    width: 160px;
    height: 160px;
    position: relative;
    left: 110vh;
    bottom: 75vh;
}