Line tracking: last minute preparation

Here it is. The day of line-tracking is coming. Being in hurry trying to improve as much as possible we did some last-minute preparation.

The main problems were as follows:
-Absence of robustness: if tape has breaks or scratches line-tracking failed
-Measurement error: it was about 3%
-Problem with sound: it sometimes didn't work at all
-Continuing movement after tape finishes.
-Presentation was not self-explanatory enough

Experiments until late night; blood and sweat at the lab... Finally, we fixed problems and created very nice presentation. Video of two various cases is shown below.