.CodeMirror {
//float: left;
    width: 100%;
    border: 1px solid black;
    background-color: #f6fdff;
    font-size: 16px;

}
iframe {
    width: 100%;
    float: left;
    min-height: 200px;
    border: 1px solid black;
    border-left: 0px;
    margin-top: 10px;

    background-color: #dbdbdb;
}
#preview{

}