Hi guys ! I 've tried to add some features to an old PG (that I have just mada for a previous topic); that one : http://www.babylonjs-playground.com/#1PTVTW#9 I try to apply an impulse to a sphere that "come out" from the ships (when they reach the island) and hit the target (the cylinder in the middle). It works, but just the for time; instead, I would repeat these applyImpulse on every 1sec (or 2sec), after they reach the island. I try to apply the setTimeout() function, but the result does not work well. Here the other PG (it doesn't work): http://www.babylonjs-playground.com/#1PTVTW#10 . So have any idea on how can I do that? Do you think it's the best way? Thank you in advance for your time and patience, cheers