参考了学长的代码并添加了循迹以及多任务处理（确保遥控和彩灯能同时运行的代码
期间也学习到了不少东西
附小车照片
以及循迹视频
https://github.com/LakiAo/Remote-controlled-robotic-arm-trolley/assets/42827331/58e08dfd-36a3-4c7e-905b-a071dbc172df
LakiAo/Remote-controlled-robotic-arm-trolley
The car is made for STAS-Science and technology exhibition.
C