Path Tracing Particles In this example, the Particle Component uses a specially modified Particle to trace the path it wanders. The resulting form is somewhat organic in appearance. Essentially, the first thing each particle does is create a pen positioned over the emitter. Then, for every frame, it uses the drawing API to trace a line following its path. When the particle self-destructs, the path it traced is left behind. This is an example from the Particle Emitter component originally published with Flash MX Components: Most Wanted.