Personally, it was not an easy lecture. The editor part is intuitively understandable without much understanding, but the problem is that when a design pattern appears, it is the part where the manager is built, and it is hard to follow the flow of what it really means. However, after watching the lecture once and watching it again, I gradually see the intention behind building this framework, and I start to understand it. That's when I realized the true meaning of this lecture.. I really recommend this lecture. People like me who don't have much coding experience will probably have a hard time at first, but if you watch it several times and try your best, I think you will get good results! Oh, and the instructor often refactors to make the code as efficient as possible while giving the lecture, so you may get dizzy here, but since it contains a lot of know-how, I think it will be more helpful if you stop slowly, follow along, and understand it.