程序说明：



1.本程序实现了字母C的自转、上下自动伸缩、绕正方形轨迹往返的功能；

2.本程序实现了数字3的绕字母公转功能；

3.本程序实现了上色以及地板的双面着色；

4.本程序实现了按shift加速；

5.本程序实现了镜头绕Z轴转动的功能。-Program: 1. This program implements the letter C' s rotation, stretching up and down automatically, around the square path from the function　(2) realized by the digital revolution letters around 3 functions　3 realized by the color and the floor double-sided color　4 realized by the shift accelerated by　5 realized by the lens rotation around the Z-axis function.