Two artist from TRAKT art group - Lukáš Matejka and Pavol Soukal - prepared an interactive project called Dark Matter Spray for DIG gallery in Košice. Dark Matter Spray is inspired by project Digital Graffiti. A software is using hybrid programming environment VVVV, which can connect and control digital actions with a real environment. A spray is using infrared technology and participant can create “digital dark matter” on the projection of the universe. The idea of Dark Matter Spray was initiated by college pedagogue Michal Murin.