Is it possible to change the background colors of the app that we are creating? And that the site buttons and the background colors of the buttons and the fonts of the letters, including the texts, move from one day to the next, without anyone doing it? Can it be because of a bug?
Use the controls described in Screen to change the Properties of most of the Screen controls in the Screen1.Initialize Block. You will discover you cannot do the changes using Blocks for all the Properties.
You will probably need the skills described here> Programming Your App to Make Decisions to tell the app what to do and when.