_address _command newChar 15 _address _command newChar _command fill(0) 1 1 Hello, world! newChar back UNTIL EQ newChar b'\x15' fill(0) 1 1 后退 M1 ANTICLOCKWISE 100 M2 ANTICLOCKWISE 100 newChar _command NEQ newChar b'\x15' BREAK forward UNTIL EQ newChar b'F' newChar _command fill(0) 1 1 前进 M1 CLOCKWISE 100 M2 CLOCKWISE 100 NEQ newChar b'F' BREAK left WHILE EQ newChar b'D' fill(0) 1 1 原地左转 M1 ANTICLOCKWISE 100 M2 CLOCKWISE 100 newChar _command NEQ newChar b'D' BREAK right UNTIL EQ newChar b'C' fill(0) 1 1 原地右转 M1 ANTICLOCKWISE 100 M2 CLOCKWISE 100 newChar _command NEQ newChar b'C' BREAK