body {
    font-family: Open Sans, Helvetica, sans-serif;
}
#left {
    border-color: red;
}
#left .handle {
    background-color: red;
}
#right {
    border-color: #17A2B8;
    border-width: 5px;
    width: 20em;
}
#right .handle {
    background-color: #17A2B8;

}
#bottom {
    border-color: blue;
}
#bottom .handle {
    background-color: blue;
}
pre {
    margin-left: 3em;
}
#rcorners2 {
    border-radius: 25px;
    border: 2px solid #73AD21;
    padding: 20px; 
    width: 200px;
    height: 150px; 
}