.square, .circle {
    width: 100px;
    height: 100px;
    display: inline-block;
    float: left;
    
}
.circle{
    border-radius: 50%;
}
#block1 {
    background-color: lightpink;
}
#block2 {
    background-color: palevioletred;
}

#container {
    background-color: aliceblue;
    margin: 0 auto;
    width: 800px;
    height: 800px;
}

h1{ 
text-align: center;
font-size: 50px;
font-weight: 600;
}

body {
    background-color: skyblue
}