How to rewind a particlesystem?

Dear community, I am working on a timemanipulation game and trying to bring this code right here private void fixedUpdate(){ foreach (ParticleSystem p in parts) { //var pa = p.emission; //pa.enabled = false; //p.Stop(); //p.Clear(); //p.Pause(); if (Input.GetKey(KeyCode.R)) { //po.simulationSpeed = 0; if (p.time > 0) { p.time -= 1; //p.Simulate(p.time, false, true, true); } } else if (Input.GetKey(KeyCode.F)) { if (p.time < p.main.duration) { p.time += 1; } } p.Simulate(p.time); //p.Play(); }} to work... as you can see I ve tried everything to make the particlesystem rewind, but nothing seems to work, even the given answers of the community page didnt help... hope you can help me, thanks in advance.