这是一个模拟烟火效果的例子，主要是演示粒子变换以及粒子的生命周期。-This is an example of simulation of pyrotechnic effects, mainly demonstrated particle transformation and the particle' s life cycle.

FireSystem 烟火系统 设置时间挫，进行实时显示-FireSystem pyrotechnic system to set the time down of real-time display