eli0s Thank you, I found it in the topic you linked.
Develop games in your browser. Powerful, performant & highly capable.
My plugin for side-scrolling games has the parallax origin at the bottom of the layout, which makes adding layered backgrounds so much easier.
Check it out, I just updated it to version 1.1, which adds animated backgrounds: https://www.scirra.com/forum/viewtopic.php?f=153&t=165505
I also have a template in case you prefer to do it using the event sheet: https://www.scirra.com/store/royalty-free-game-templates/parallax-backgrounds-1289