0000000000000000000000000000000000000000 f1dd4668982fa0375d99f5f4857754b2e0bf7732 RenLi <renli4096@gmail.com> 1552166131 +0000	commit (initial): positive and negtive version
f1dd4668982fa0375d99f5f4857754b2e0bf7732 b646e84555a58fc5644fcce621576e4d7bc56354 RenLi <renli4096@gmail.com> 1552166735 +0000	commit: blue and red display version
b646e84555a58fc5644fcce621576e4d7bc56354 7b1c34b5c9657be82f41fda670f731df8840ae7d RenLi <renli4096@gmail.com> 1552170720 +0000	commit: add robot moving function
