About some question for HTML and images

Help & Support
1

How do I get images in the HTML loading engine

2

Are you talking about the preloader?

image

3

I mean, how do I change the style of HTML buttons, and I think I can only decorate them with solid colors, and if I want to replace them with images that I want, what should I do

4 
<style>
#someid{
background:url(some url of and image);
}
</style>
<button id = "someid">name of button </button>

im pretty sure thats right if not plz tell me