how can you make it so that when an actor gets to a place in the world it goes to the next world
// variables defining the area where the actor must be to switch worlds
int hitboxMinX, hitboxMaxX, hitboxMinY, hitboxMaxY;
// code to change worlds (after the movement code)
if (getX() >= hitboxMinX && getX() <= hitboxMaxX &&
getY() >= hitboxMinY && getY() <= hitboxMaxY)
Greenfoot.setWorld(new World2());