import java.awt.*;
import java.awt.event.*;

public class Losange extends java.applet.Applet  {
  int theta = 45, delta =45;
  public void init(){
    addMouseListener( new MouseAdapter() {
      public void mousePressed(MouseEvent e){
        theta = (theta +10)%360;
        repaint();
      }
    });
  }
  public void paint(Graphics g) {
    int largeur = getSize().width;
    int hauteur = getSize().height;
    int dl = largeur/2, dh = hauteur/2;
    int [] polx = { 0, dl, largeur, dl};
    int [] poly = {dh, 0, dh, hauteur};
    Polygon pol = new Polygon(polx,poly,4);
    
    g.setColor(Color.black);
    g.fillRect(0,0,largeur,hauteur);
    g.setColor( Color.yellow);
    g.fillPolygon(pol);
    g.setColor( Color.red);
    g.fillRect(dl/2, dh/2, dl,dh);
    g.setColor( Color.green);
    g.fillOval(dl/2, dh/2, dl,dh);
    g.setColor( Color.blue);
    g.fillArc(dl/2, dh/2, dl, dh,theta, delta);    
  }

}