I would like to create a loading icon that show the app is loading the page. I would like to use our logo and animate inside the logo a vertical translting fill like here:
I'm more a front end html/css/js developper and don't even know how to create GIFs. What are the tools and steps to create such an effect on our logo ? I would also like to optimize the weidht of this gif so that like on the above website, the gif < 15kb.