Help 2D physics

[josemendez]

Thanks for the reply.
For the 2nd question. I meant one particle. Furthermore, can I delete the particle after a certain amount of time?

Simply set the emitter's num particles to one if you only want to have one particle simultaneously on the scene, or make a really small emitter shape with only 1 emission point.

Particles are deleted automatically after their lifespan ends. See:
http://obi.virtualmethodstudio.com/tutor...tters.html