Particle system Rewinded but not start again

Hi guys I have little problem with my code. I make timeline of particle effect and make it rewinded when timeline reach value . But after that rewind I can't play again this particle system becouse when I play it I dont see it. Can someone tell me where is problem ?

void Start () { particle.randomSeed = 1;

 }

void Update() {

     czas = czas + time.deltatime
      
     if (czas <=4) // patrilce system playing forward
     {
     particle.enableEmission = true;
     }
     if (czas > 4 && czas <=8) // particle system playing backward form position where "czas" get value >4
   
     }
  particle.Simulate(Mathf.PingPong(Time.time,  particle.duration - 0.2f),false);
     //here we make rewinde particle system
     }
     if (czas > 8 ) // RESET to play it again in next frame
     }
     czas = 0 ;
     particle.enableEmission = false;
     }

}