我不用说，你们自己看。是不是很有艺术感？在程序区，有几种准备好的积木，你换换试试看。
I don't have to say, you see. Is it very artistic? In the program area, there are several ready building blocks. You can change them.
Notes & Credits
有参考《Scratch高手密码》中的一个案例。
There is a case in "scratch master password".
