The main method
When you create a new world, an empty skeleton of a method named my_first_method is automatically created as a method belonging to the world.
By default, each time you play your program, this method will be executed first.
The Java, C#, C, and C++ programming languages all have a method or function that is executed first when a program written in one of those languages is executed.
In those languages, that method or function is named either main or Main, depending on the language.
To be consistent with those languages, I will rename the method named my_first_method to main.