body {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#artwork {
    width: 600px;
    height: 600px;
    background-color: #e0e0e0;
    position: relative;
}

.rectangle {
    position: absolute;
}

.large {
    width: 300px;
    height: 150px;
}

.medium {
    width: 200px;
    height: 100px;
}

.small {
    width: 100px;
    height: 50px;
}

.red {
    background-color: #ff5252;
    top: 50px;
    left: 50px;
}

.blue {
    background-color: #4285f4;
    top: 250px;
    left: 350px;
}

.yellow {
    background-color: #ffeb3b;
    top: 400px;
    left: 100px;
}

.circle {
    border-radius: 50%;
    position: absolute;
}

.circle.large {
    width: 180px;
    height: 180px;
    top: 300px;
    left: 100px;
}

.circle.medium {
    width: 120px;
    height: 120px;
    top: 150px;
    left: 400px;
}

.black {
    background-color: #212121;
}

.white {
    background-color: white;
    border: 2px solid #212121;
}