Kapow! Blam! Zap! This Saturday, comics fanatics stock up on Red Bull, grab their art supplies and hole up at Phoenix Books Burlington for 12-Hour Comics Day. As part of an international celebration of creativity taking place across several continents, artists and writers over age 13 challenge themselves to draw, write and color for 12 hours straight. From splash to spread, experienced cartoonists and first-timers alike put pen to paper and push out several months’ worth of panels in just half a day in this abbreviated version of 24-Hour Comics Day.