.helloworld{
    padding: 10px;
    background: red;
    position: absolute;
    left: 10px;
    top: 10px;
    z-index: 100000;
    width: 640px;
    height: 400px;
    background: url("@{image-path}/puppy.jpg");
    box-sizing: border-box;
    color: white;
}