It's much more interesting if you can actually build things that are interactive, that are animated, that play music and so forth and not just produce things on day 1 that outputs zeroes and ones like this.

如果你构建的东西是互动的,像动画，音乐播放等等，而不是编些像第一天那样,只是输出0和1的程序。

哈佛公开课 - 计算机科学课程节选

In just a moment the hearts are gonna start flowing from bottom to top and the cookies are gonna start moving left and right and they seem to be somewhat synchronized with the music, perhaps based on trial and error by the student who implemented this one.

刚刚那一刻，那些爱心们从底部上浮到顶部,饼干人则向左向右移动,它们似乎都随着音乐的律动而变化着，也许这是那个制作该动画的同学,不断尝试的结果。

哈佛公开课 - 计算机科学课程节选