fireworks_particle_bjs.js

var fireworksParticle ={json data};
var fireworksParticleSystem = new ParticleSystem.Parse(fireworksParticle,scene,"",true);


var lineParticle ={json data};
var lineParticleySystem = ParticleSystem.Parse(lineParticle,scene,"",true);
lineParticleySystem.start();

lineParticleySystem.onAnimationEnd= function(){
    console.log("line particle ended!");
    fireworksParticleSystem.start();
}