Configure the second lighthouse image to display when the mouse

pointer passes over the hyperlink. Add the following styles to the nav

a:hover selector to display the second lighthouse image. The value

right in the background$-$position property configures the lighthouse

image to display at the right of the navigation element. The value

$-100$px in the background$-$position property configures the display at

an offset of $100$ pixels down from the top so the second lighthouse

image appears.