import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class lobster here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class lobster extends Actor
{
    /**
     * Act - do whatever the lobster wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
     public void act()
    {
        // Add your action code here
        move(3);
        turnAtEdge();
        control();
    }
    public void turnAtEdge(){
       if(isAtEdge()){
            turn(20);
        }
    }
    public void control(){
    if(Greenfoot.isKeyDown("up")){
    turn(15);
    }
    if(Greenfoot.isKeyDown("down")){
    turn(-15);
    }
    }
}