Customizing button

First of all, awesome plugin!

Hello, I want to customize button’s appearance a litlle bit. I want that in loading phase, image would change button (button disappears, image shows up). How can i do that? Tried through css, still cant make it work.

Same with standart buttons phase. Need to change button with image (like arrow or something).

Thanks

https://www.ads-software.com/plugins/ajax-load-more/