https://www.youtube.com/watch?v=4EemXke3E78

T. D. Ta, F. Okuya, Y. Kawahara, “LightTrace: Auto-router for Designing LED Based Applications with Conductive Inkjet Printing,” Proc. of ACM SCF '17, Article No. 3, DOI: 10.1145/3083157.3083160, Jun. 2017.