#box{
    width: 100px;
    height: 100px;
    background-color: #f00;
    position: absolute;
    top: 60px;
    left: 400px;
}

pre{
    width: 100%;
    height: 200px;
    padding: 20px;
    box-sizing: border-box;
    background-color: #ccc;
    border: 1px dashed#000;
    font-size: 14px;
    color: #008000;

}