initial design
The next step in designing a program is to think about the major tasks the robot has to perform and decide how you can solve them. For one thing, the TriBot should travel next to the wall while staying a short distance away from it. You can use the Ultrasonic Sensor to tell how far the TriBot is from the wall and use Move blocks with different steering settings to move toward or away from the wall.
Because the wall will be next to the TriBot as it’s moving, you need to mount the Ultrasonic Sensor pointing to the side (instead of to the front). Follow the building instructions in alternate placement for the ultrasonic sensor in alternate placement for the ultrasonic sensor to mount the sensor so that it points to the side, as shown ...
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