Tutorial for Energy/GUI ?

hey I don't really have a tutorial but by linking the energy I will assume that you talk about the energy that is received or the energy contained in the block or other, you must in the gui create a new text, and selection instead of label text, <energy> and this will display the energy of the block in question (if you want tutorials go on youtube there is a youtuber who has done a lot on the energy of mcreator and especially in the version 2020.4 and 2020.5)