Following a polygon line
Programming hints
Use the optical ground sensor to detect the inside or outside border of the polygon line. Try to keep the sensor at 50% reflected light intensity and use a proportional error signal to adapt the turning angle of the robot while slowly advancing.
Preview of the printed A4 sheet
![Preview of the printed A4 sheet](https://beta.geogebra.org/resource/g8sLpuSt/Ytnj8XHUfhHY5oEI/material-g8sLpuSt.png)