How to create an animated icon

Hi!
I need to add an animation to a project, that I`m currently working on. I wonder what options can Animate give me. 

I don`t want to use any plugins for this, just because I believe that it slows down the website.  

Here’s the screenshot: 

I'd like to add a shine animation to the fragments that I`ve circled (look at the screenshot). 

Appreciate similar working examples.

Page example: https://43dprint.org/best-3d-printer-for-cosplay/

Main page example: https://43dprint.org/