The principle of light painting photography is to slow down the shutter speed of the camera, and then use a luminous object to draw out shapes. The camera then records the motion trajectory of the luminous point. In this article, we introduce a set of light-painting photos by David Gilliver. The special feature of this set of photos is that they were taken in a fortress abandoned after World War II. As night falls, in the empty fortress, Gilliver uses glow sticks to paint waves, roads, gunpowder spraying from cannons, sparks bursting underground...