PEEPER on Instagram: "This classic animation explains how an internal combustion engine works by turning each step into a simple visual story. The piston, valves, and spark plug are shown working together through the four-stroke cycle: intake, compression, combustion, and exhaust. By exaggerating motion and timing, the animation makes invisible processes like air–fuel mixing and ignition easy to follow, even for non-engineers. While simplified, the model is technically accurate. It doesn’t show