This is the all-in-one demo of pseudo-elements with CSS 3D transforms. It does not include any comments or detail beyond the HTML and CSS on this page. If you're looking for that, please see the associated article.
This is basically the original posted "flying stars" demo. However the images have been replaced with just a background color. It is easy to see then it is flawed as the green circle will always appear on top of the pink one.
oh, my. flying stars ...