图形界面(幸福乐园).有房子,太阳,草地,蓝天.颜色可由函数设置,太阳可以随意移动,蓝天,草地为固定的.所有操作由函数实现.-graphical interface (happiness Paradise). A house and the sun, the grass, the blue sky. Color can function settings, sun can arbitrarily Mobile, a blue sky, grass-fixed. all operations by Function.