It was literally like that. I had a script of about 310 lines and the main function was like 10-20 lines of code. I had a very nice Setup of objects that handled all functionality possible behaviours independent and so my main function was just receiving a user input from another function and add accordingly which included like 3-4 different scenarios that are being handled in the main function.
Its also very nice, when you spend hours writing everything else and then once all of it has been tested you write a few lines of code in the main function and 10 minutes later everything works as it should.