I got angry when I saw the code I wrote when I was a new employee 2 years ago and tried to refactor it, but I couldn't figure it out. So I watched the test code lecture and was impressed and started studying with confidence, but I regret not seeing it sooner... I've been burned out lately, but thanks to this, I've been enjoying developing lately while refactoring. When I looked back on myself simply defining functions at a specific level, I felt ashamed of myself thinking, `I'm pretty good at this, aren't I?` I'll just start studying from now on with the mindset of a 0-year employee and erase my career. Thank you. Please let me know when the next lecture comes out, whether it's a notification or something. Please, please.