body {
    font-size: 18pt;
    font-family: arial;
    color: white;
    padding: 0;
    margin: 0;
    background-color: black;
}

div.box {
    display: block;
    width: 250px;
    height: 250px;
    margin: 0;
    padding: 0;
    float: left;
}

div#topLeft {
    color: darkblue;
    background-color: red;
}

div#topRight {
    width: 200px;
    height: 200px;
    border: 25px solid blue;
    background-color: lightblue;
}

div#bottomLeft {
    border-radius: 20px;
    background-color: yellow;
}

div#bottomRight {
    background-color: purple;
    color: red;
}

div#outerBox {
    width: 500px;
    height: 500px;
    border: 10px black;
    margin: auto;
    box-shadow: 0px 0px 20px 10px green;

}