Midterm Idea

For my midterm I would like to create a a sensor like the back of a car when you are backing up. While using the distance sensor, there will be lights and sound, when you are far away only the red light will go on with a low pitched sound. As you are getting closer the yellow lights will go on telling you you are getting closer, but once you see the green light and a high pitched sound, that means you ave no more room to back up. And that is my idea for the midterm,