.rectangle {
    width: 100px;
    height: 20px;
    display: block;
    float: none;
}

#rectangle1 {
    background-color: red;
    position: relative;
    left: 250px;
    bottom: 400px;
}

#rectangle2 {
    background-color: red;
    position: relative;
    left: 50px;
    bottom: 40px;
}



#blockRed {
    background-color: red;
    position: relative;
    top: 200px;
    left:200px;
}

#blockBlue {
    background-color: red;
    position: relative;
    bottom: 200px;
}

.square {
    width: 200px;
    height: 200px;
    display: block;
    float: none;
}

#container {
    background-color: #3c3e86; margin: 0 auto;
    height: 400px;
    width: 400px;
}