Your description of what you actually want to do is very vague. Explain it further and maybe someone can actually help. P.S.: You cannot expect someone to reply to your post after just an hour...

You need 3 actor subclasses for this. One which is a person who makes the mess, another to clean it up and a third which is the mess. From the first class, you create objects from the third class(mess) and from the second class you remove it.

Definitely sounds like you need to go through the tutorial videos (in the Documentation section). Never ask for the code, the idea is that you should learn how to develop the code yourself. Have a go. Create a scenario, add the classes as SPower suggested. Watch the tutorials. Make it so that your two actors (the one which makes the mess and the one that cleans it up) are added automatically when the world is created. Then you've got a starting point. If you can get this far, ask for some more help (tell us what your classes are called, and give more information - when do you want the mess dropper to drop mess, what strategy should the cleaner use, etc). You really cannot expect much help with such a vague question. It's not that we don't want to help, but it's really difficult when we don't even understand what you want, and you haven't even started writing any code so it's hard to suggest how to improve it.

Sir davmac I will appologise for my vague question I hope this wil I be better I know is not right to ask for a code but I try it for days to make the code but I wil say sorry for asking I hope this wil better, I like to make a game with somepeople that make a mess and one guy need to cleanup This is the code that I have (I have peoples that can walk different en a guy that I can drive) But I wil that de people who walk different drop sometime a item (mess) The code: concierge (I can drive public class concierge extends Animal { public void act() { move(4); if ( Greenfoot.isKeyDown("right")) { turn(5); } if ( Greenfoot.isKeyDown("left")) { turn(-5); } if (atWorldEdge()) { turn(15); } if(canSee(mess.class)) { eat(mess.class); } if(canSee(student.class)) { eat(student.class); Code: (this students need to drop sometime a item but I don't know how) public class student extends Animal { public void act() { move(6); if ( Greenfoot.getRandomNumber(101) < 15) { turn( Greenfoot.getRandomNumber(40)-20 ); } if (atWorldEdge()) { turn(15);

In student: Next time: think about it yourself :)