배경 출처: https://www.google.com/search?q=%EB%8C%80%ED%95%9C%ED%95%AD%EA%B3%B5+%EC%9D%B4%EC%BD%94%EB%85%B8%EB%AF%B8+%EC%A2%8C%EC%84%9D&rlz=1C5CHFA_enKR915KR915&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjDzNuktofwAhUMLJQKHRllBmQQ_AUoAXoECAEQAw&biw=1433&bih=766#imgrc=CPK-gqO6oEG0iM
