Akiyuki has a knack for creating elaborately engineered LEGO creations. But this latest creation is possibly the most complex yet. Using a mangle rack system that converts the spinning of gears into rectilinear motion (i.e. straight lines), Akiyuki was able to create an accurate second hand on a giant LEGO clock frame. From there, the minute and hour hands were a breeze…well maybe not a breeze, but Akiyuki sure makes it look easy.

Check out the video below for a full breakdown on the construction and operation of the clock, including a timelapse next to a standard clock to demonstrate its accuracy. Make sure you turn on the closed captioning for Akiyuki’s full commentary.