If you got a huge header, you can try to show to different images each time a user loads your site. You can rotate as many images as you want. But here for example we are giving you a example of three images. Hope this helps some.

Note: Do take backup of your theme before you try this.

01. First rename your images with a underscore like these:

02. Add this below code in your header.php file or the file where the code for your header image is placed:

03. If you want to do with more images, change the number 3. That’s it.