Greetings,

i'm building a custom module around Telehealth (doctor/patient appointment and prescription over the internet)  i want to be able to generate as much of additional fields as i want to , by clicking on a button , like shown in this picture https://i.imgur.com/E0pZUMr.png , what should i add in my python file and xml file to achieve this , some people suggested to hide/show the fields but i want to generate new ones each time i press a button not hide/show a certain number of predefined fields ! 

my sincere gratitude ~