.square {
    width: 100px;
    height: 100px;
}

#blockBlueviolet {
    background-color: rgb(171, 116, 224);
}


.square {
    width: 100px;
    height: 100px;
}

#blockRed {
    background-color: rgb(247, 180, 242);
    position: relative;
} 


.circle {
    border-radius: 50%;
}

#blockRed {
    background-color: rgb(247, 180, 242);
} 

.circle {
    border-radius: 50%;
}

#blockBlueviolet {
        background-color: rgb(171, 116, 224);
        position: relative;
}

#container {
    background-color: rgb(169, 204, 255); margin: 100;
    width: 400px;
}

.square, .circle {
    width: 100px;
    height: 100px;
}

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