import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;


public class Animek6 extends JFrame{

    MyComponent komponent;
    int MAXN=200;
    int n=0;
    int alfa=0;
    Timer timer;
    int [] xtab=new int[MAXN];
    int [] ytab=new int[MAXN];
    int D=20;
    class MyComponent extends JComponent{

        @Override
        protected void paintComponent(Graphics g) {
            int w=getWidth();
            int h=getHeight();
            int x=0,y=0;
            int x0=w/2;
            int y0=h/2;
            int R=((w<h)?w:h)*9/20;
            g.drawArc(x0-R, y0-R, 2*R, 2*R, 45, 180);
            int a=(int)Math.round(R*(2.0-Math.sqrt(2.0))/2.0);
            g.drawLine(x0+R-a,y0-R+a,x0-R+a,y0+R-a);
            g.drawLine(x0+R,y0,x0,y0);
            g.drawLine(x0,y0,x0,y0+R);
            g.drawArc(x0, y0, 2*R, 2*R, 90,90);
            int c=(int)Math.round(Math.PI/2.0*R);
            int obw=4*R+3*c;
            int nb=MAXN*R/obw;
            int nc=(MAXN-4*nb)/3;
            if(n<nb){

            }else if (n<nb*2){

            }else if(n<nb*2+nc*2){
                double kat=-Math.PI*0.75+Math.PI*(n-2*nb)/nc/2.0;
                x=(int)Math.round(x0-R*Math.cos(kat));
                y=(int)Math.round(y0+R*Math.sin(kat));
            }else if(n<nb*3+nc*2){
            	   double kat=-Math.PI*0.75+Math.PI*(n-2*nb)/nc/2.0;

            }else if(n<nb*4+nc*2){

            }else{


            }
            xtab[n]=x;
            ytab[n]=y;
            g.setColor(Color.RED);
            //for(int i=0;i<MAXN;i++){
            for(int i=n;i>n-10;i--){
                //g.setColor(ctab[i]?Color.RED:Color.GREEN);
                int q=(i>=0)?i:i+MAXN;
                g.fillOval(xtab[q]-4, ytab[q]-4, 8, 8);
            }

            g.setColor(Color.BLACK);
            super.paintComponent(g);
        }

    }
    public Animek6(String string) {
        super(string);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        Toolkit kit=Toolkit.getDefaultToolkit();
        Dimension d=kit.getScreenSize();
        setBounds(d.width/4, d.height/4, d.width/2, d.height/2);
        add(komponent=new MyComponent());
        timer=new Timer(20,new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                n++;
                if(n>=MAXN)
                    n-=MAXN;
                alfa++;
                komponent.repaint();
            }
        });
        timer.start();
        setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Animek6("Animek 6");
            }
        });
    }

}