Do not post questions here!
This forum is for example code you want to show other people. Ren'Py questions should be asked in the Ren'Py Questions and Announcements forum.
Thank you for this tuto it's good thing for a newbie.
But there is something I don't understand about the common.rpy and screen.rpy files generated by the ren py translation function.
If you have an explanation it would be nice! See the post