OK I understand for the negative number, that means I can leave it as it is then. what about the option for crabs dying because they eat all the worms, I guess it will never happens because the moves will occur before they eat all the worms, am I correct?

It is possible that the majority of the time that could be the case. It really depends on a lot of things (the size of the world, the size of the actors, the distance moved per act, ratio of crabs to worms, and even the way the actors move could be an influence among other things). However, if there is ANY chance that the worms are all eaten before all the crabs die, then you should have code in your project to stop the scenario when this condition occurs.

OK. I thank you very much danpost for sticking up with me all this time, and I thank all of you who also help me out for this project. I know one thing Coding is interesting but NOT easy at ALL!!! Thank you very much.

wormsEaten = wormsEaten - 1; //R6 if (wormsEaten == 0) // R6 { getWorld().removeObject(this); }

Yes I know I brought it up to danpost, and this is what he said: It is possible that the majority of the time that could be the case (to eat all the worms). It really depends on a lot of things (the size of the world, the size of the actors, the distance moved per act, ratio of crabs to worms, and even the way the actors move could be an influence among other things). However, if there is ANY chance that the worms are all eaten before all the crabs die, then you should have code in your project to stop the scenario when this condition occurs.

(to eat all the worms): I did not say that (or mean that). You said that the crabs run out of energy and die before all the worms are eaten. And, I was saying that this could be the case most of the time (to NOT eat all the worms before all the crabs run out of energy and die).

No it is not before, it is either or. Here are the choices: Once a Crab has reached zero Worms eaten, it dies and disappears from the world. Stop the game once all the Worms have been eaten or all the Crabs have died.