CedTextParticle display text using particles. A particle system is a technique used to simulate a variety of special visual effects like sparks, dust, smoke, fire, explosions, rain, stars, falling snow, glowing trails, and many others. Basically, a particle system consists of emitters and the particles themselves. The basic idea behind particle system is very simple – by drawing lots of very small squares or circles, which behave individually according to some rules, you can generate a visual effect where the sum of the parts is much more than the parts separately.