I am trying to place a large background image in the child theme I am developing. I want it to be 100% width all the time and resize with the window. In the past I have put this code...
<div><img id="diamondigloo" title="" alt="" src="images/diamondigloobackground.jpg"/></div>
...at the end of my footer.php page and this in the css...
But I want to do this the right way with a child theme. How would I go about that? Do I make a plugin or add a function to functions.php? I'm definitely new to this hooks and filters and plugins business, so some guidance would be wonderful.