This lecture will teach you well what to do first when you look back at the code you hurriedly wrote due to a tight schedule. If you have to spend more time than the lecture time because of the amount of typing, and it is difficult to go back and forth, you can just think of the instructor as showing a demonstration, fold your arms, listen for a while, and then put your hands on the keyboard. I personally felt that there was less time to communicate about code in a team with many developers who only focus on implementation, but I hope that many people will be able to meet colleagues who listen and think about good code and increase the probability. One thing that was a little difficult while listening to the lecture was that I didn't understand the Minesweeper example that was in the first example. I guess it's because I've never played Minesweeper before. There was an explanation, but I didn't understand it well. However, the study cafe example that came after was really good. It was convenient because the test code used examples of things that I often use in my daily life, such as kiosk orders, as examples, but the Minesweeper topic was a little difficult. People like me will have a hard time with the Minesweeper example, but the study cafe example will deepen their understanding.