Make Featured Box images change banner images

Hi,

I am trying to get the Featured Box images on the Simplify homepage to change the image on the site banner once they are clicked (or hovered over, if possible). This appears to be similar to the “Make Featured Box images Links to Pages” thread but I just want the links to change the banner image (which will become 1 of 3).

Is this possible to code? Any help would be appreciated!