import java.applet.Applet;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.util.ArrayList;

public class Appl extends Applet implements Runnable{
	ArrayList<Kwadrat> lista;

	public int losuj(int a, int b){
		return a+(int)(Math.random() * (b-a));
	}

	public Appl(){
		int N = 3;
		String ile = getParameter("ILE_KWADRATOW");
				if(ile != null){
					try{
						N=Integer.parseInt(ile);
					}catch(NumberFormatException e){
						System.err.println("Błedna wartość " + ile );

					}
				}

		lista = new ArrayList<Kwadrat>(N);
		Dimension d = getSize();
		for (int i = 0; i < N; i++){
			lista.add(new Kwadrat(losuj(20,60),d));

		}

		setBackground(Color.blue);
		new Thread(this).start();


	}
	public void paint(Graphics g){
		for(Kwadrat k : lista)
			k.rysuj(g);

	}
	public void run(){
		while(true){
			try{
				Thread.sleep(300);
			}catch(InterruptedException e){

			}
			for(Kwadrat k : lista)
				k.zmniejsz();
			repaint();
		}
	}


}