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.
     */
    int count=0;
    public void act() 
    {
        move(5);
        randomTurn();
        turnAtEdge();
        eat();
    }    
    
    public void eat(){
        if(isTouching(Crab.class)){
            removeTouching(Crab.class);
            Greenfoot.playSound("slurp.wav");
            count++;
        }
        if(count==1){
            World w = getWorld();
            GreenfootImage bg = w.getBackground();
            bg.setFont(new Font(true,true,150));
            bg.setColor(new Color(250,0,0));
            bg.drawString("失败！",120,300);
            Greenfoot.stop();
        }
    }
    public void turnAtEdge(){
         if (isAtEdge()){
         turn(15);
        }
    }
    public void randomTurn(){
        if(Greenfoot.getRandomNumber(100)<40){
            turn(Greenfoot.getRandomNumber(30)-15);
        }
    }
}