Respuesta :

tonb

I'm trying to solve this in the following jsfiddle: https://jsfiddle.net/0u9tqfr2/1/


body { background-image: url(...); }


#header { background-color: aqua; width: 800px; }


#sidebar { background-color: yellow; width: 200px; float: left  }


#content { background-color: lightgray; width: 500px;  }