.square {
    width: 400px;
    height: 400px;
    display: block;
    float: left;
}

.row {
    width: 800px;
    height: 400px;
    display: block;
}

#blockRed1,
#blockRed2 {
    background-color: rgb(150, 3, 3);
    position: relative;
}

#blockBlue1,
#blockBlue2 {
    background-color: rgb(68, 32, 141);
    position: relative;
}

.blockSmallRed {
    background-color: rgb(150, 3, 3);
    width: 150px;
    height: 30px;
}

#smallRedOne {
    position: fixed;
    left: 540px;
    top: 8px;
}

#smallRedTwo {
    position: fixed;
    left: 130px;
    top: 778px;
}