A minimalist motion graphics animation on a pure black background. A thin, glowing yellow line stretches horizontally across the frame, marked with four unlabeled circular nodes evenly spaced along its length. An electric current effect — resembling a pulsing loading bar or animated energy flow — travels smoothly from the first node to the second, then to the third, and finally to the fourth, with a bright spark or glow trailing behind it as it moves. Each node briefly flashes and intensifies in brightness as the current reaches it, then dims slightly before the next pulse continues. The yellow line has a subtle neon glow effect against the stark black background, clean and modern sci-fi infographic style. Smooth easing motion, no camera movement, flat 2D vector aesthetic. Duration: matches voiceover timing.