Seeing in the Dark - NYTimes.com The designer Alex Trochut typically expresses himself through typography or illustration - or a merging of the two - and those skills were on display in the magazine a few months ago in his illustrated headline for one of our feature stories. But he has ventured far beyond those familiar applications in his new project, "Binary Prints," which was inspired by and features as its subjects electronic musicians like James Murphy, Caribou, Four Tet and Damian Lazarus. Trochut's posters can be seen at this Web site created for them and in an exhibition that opens this week in Barcelona. Trochut has figured out a way to have two entirely different images share the same surface, one of which is visible in the light, the other in the dark. Think glow-in-the-dark or Magic Eye posters on steroids. Trochut describes his posters as "perfect to enjoy" in a room where you could flip a light on or off; on his site, you can get the same effect with a click of the mouse. Better, though, if you can see the pictures in person: "We have prepared a room with a light timer that switches automatically every 10 seconds," Trochut explains. This makes the viewer wait for its secret night image, adding some jack-in-the-box moment. For me, the moment is a sweet combination of nostalgia, of childhood sensations recalled, and the thrill of a first-time experience.