At the intersection of modern art, science, and technology, the fourth annual Signal Light Festival took over the streets of Prague for four nights, ending Sunday evening. The show featured animated movies, video-mappings, interactive art, and light displays. Starting Thursday night, hundreds of thousands of attendees wandered through the Prague city center to admire 22 spectacular sites put on by artists from all over the world, the TOL.org portal writes. View a video here. More.