.square, .circle {
    width: 100px;
    height: 100px;
    display: inline-block;
    float: none;
   }
  
 .circle {
    border-radius: 50%;
    }

    #blockPink {
        background-color: rgb(255, 0, 128);
        position: relative;
        }

    #blockBlue {
        background-color: rgb(25, 147, 158);
        position: static;

        }
    #blockPaper {
            background-image: url('paper.jpg');
            position: relative;
            }

     #container {
            background-color: rgb(110, 110, 196); margin: 0 auto;
            width: 1500px;
        }