The project was started before I added it to hackaday, this is our progress thus far:

4-2-2019, Marco & Vincent, 2 uur, Building distance to coordinate mapping algorithm

7-2-2019, Vincent, 2 uur 45 min, Converting the algorithm to C++ for the arduino

8-2-2019, Marco & Vincent, 50 min, Testing the Ultrasone sensor

9-2-2019, Vincent, 1 uur 30 minuten, Writing a script to make the ultrasone sensor more usable

10-2-2019, Vincent, 1 uur, Research into stepper motors