Adding rollover/hover effect to banner

My blog is at https://www.thekoreanmang.com.

I want to add a rollover/hover effect for the banner at the top of the page, the one that says “the korean mang” with a yinyang replacing the ‘o’. Because it’s an image and not text I would want it to swap with another image when visitors roll their mouse over the banner. How would I go about doing this?