F2812上有3个32位的CPU定时器，本程序主要对CPU定时器0进行操作，100MS产生1次中断，在中断中让开发板上的L1、L3、L5、L7和L2、L4、L6、L8两组发光二极管交替闪烁。

This code is described in \"Computational Geometry in C\" (Second Edition), Chapter 8. It is not written to be comprehensible without the explanation in that book. Prints out one arm configuration to reach given target. Assumes number of l