In Lesson 6, you learned the basic mechanics behind reactor-based applications. In Lesson 7, you will add functionality to this knowledge and create a garden path that knows how and when to modify itself. After testing your application and determining that it works satisfactorily, you will create a Visual LISP® application from your VLISP project.
You should consider this part of the tutorial as the advanced topics section. If you are a beginner, you may not understand all the AutoLISP® code presented here. There are several AutoLISP books listed at the end of this lesson that provide more thorough information on some of the advanced AutoLISP concepts presented here.