Arduino Homemade laboratory. Simple projects.

Friends! What to do during a pandemic ? In my home Arduino lab, I decided to make a small project and tried to turn the line sensor into a barcode reader))) But so far I managed to program the robot so that when reading white paper with one or another sensor, the robot artist performed this or that operation. The robot model is at the prototyping level, but I plan to improve this setup. What else can I do ? What to add ? At least the day passed successfully, I’m still alive ))) the Program code for this pro