import greenfoot.*;

/**
 * This class defines a crab. Crabs live on the beach.
 */
public class Crab extends Actor
{
    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("left")){
    turn(15);
    }
    if(Greenfoot.isKeyDown("right")){
    turn(-15);
    }
    }
}