High-voltage plasma arcs crackle between two terminals like a Tesla coil — jagged filaments are traced by measuring distance to a noise-perturbed line, bundled into a writhing main bolt with secondary strands and side forks, each a white-hot core inside a cyan-and-violet corona. A charge cycle builds then cracks in choreographed bursts rather than uniform flicker. Move the pointer to drag a terminal, press to trigger a heavy discharge, and scroll to raise the voltage.