I am a student named Cheon Jeong-hwan who is taking the teacher's lecture. I still have a lot to learn about flutter, and I am trying to keep up, but it is getting harder and harder. Thank you for teaching me the key points while I am taking the teacher's lecture. I often say, 'Aha~~' and then do it on my own or after some time passes, 'What was that??' I am trying to understand a little by listening to the teacher's lecture repeatedly. What I remember is the Bloc pattern and the many types of widgets. Thank you for teaching me in detail and in an easy-to-understand way. Stay healthy.