How do I know when particle finished?

Hi I am a newbie in construct. I am creating a game where a ball get destroyed and turned to particle. Now i need to spawn the ball when the particle finished. How do i know that when the particle finishes.

This is the code for the layout:

Check "Timeout" property on Particles object. If Timeout=1 second, add "Wait 1 second" before creating a new ball.