Thank you, Kevin, As you can see from my video I have built a state-machine-only robot out of a radio controlled model level car and an Arduino Nano programmed in ArduinoC_0021. The idea has been to interest middle school teachers and students in 'How things work' in 2011. Education must be relevant. My cars can race each other around a room. Speed, competition and the 'real world' makes relevance. Modify the code and win the race. My project has been going on for over a year. Recently it has been struggling. After watching a video of the 2012 Lexus parallel parking itself and realizing that it is doing some mapping, I thought I would investigate 'real' robotic code. ROS was suggested, but it does not seem the right fit. Any suggestions would be appreciated. Ken Jones