#background{
background-image: url("../images/houses.png"); /* The image used */
background-color: whitesmoke; /* Used if the image is unavailable */
height: 500px; /* You must set a specified height */
background-position: center; /* Center the image */
background-repeat: no-repeat; /* Do not repeat the image */
background-size: cover; /* Resize the background image to cover the entire container*/
}