g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f));
g2d.setColor(Color.GREEN);
int[] xVertex = {1,36,36,1,1};
int[] yVertex = {1,1,36,36,1};
g2d.drawPolygon(new Polygon(xVertex,yVertex,5));

//35X35 image
g2d.drawImage(myImage,1,1,null);

public void gameLoop()
   {
      int lastLoopTime = (int) System.currentTimeMillis();
      fpsCounter=0;
      int lastFps=0;
      Graphics2D g = (Graphics2D) strategy.getDrawGraphics();
       /////////////////////////////////////THIS IS THE FLICKERING REPAINTING OUTSIDE CLIPREGION////////////////////////////
        GradientPaint gradient = new GradientPaint(0, 0, Color.BLUE, screenWidth, screenHeight, Color.RED);
        g.setPaint(gradient);
        g.fillRect(0,0,screenWidth,screenHeight)
       ////////////////////////////////////
      setFastRendering(g);
      while (gameRunning)
      {
         int delta = (int)(System.currentTimeMillis() - lastLoopTime);
         lastLoopTime = (int) System.currentTimeMillis();
         fpsCounter++;
         
         g = (Graphics2D) strategy.getDrawGraphics();
         g.clipRect(10,80,screenWidth-20,screenHeight-90);
         g.setColor(Color.black);
         g.fillRect(10,80,screenWidth-20,screenHeight-90);
         
         //TilesEntities moves
         
         //Background
         drawBackground(g);

         // collisions
         
         //Entities moves
         tank.move(delta);
         
         // drawing
         
         Entity entity = (Entity) entities.get(0);   
         entity.draw(g);
         lastFps=hud.displayFps(g,delta,lastFps,fpsCounter);
         // remove any entity that has been marked for clear up
         
         g.dispose();
         try { Thread.sleep(0); } catch (Exception e) {}
         strategy.show();
         //
         tank.setHorizontalMovement(0);
         scrollEntities(g,delta);
      }
   }

   public Game()
   {
      // Determine if page flipping is supported
       GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
       gd = ge.getDefaultScreenDevice();
       GraphicsConfiguration gc = gd.getDefaultConfiguration();
       BufferCapabilities bufCap = gc.getBufferCapabilities();
       boolean page = bufCap.isPageFlipping();
      
      Frame container = new Frame(gd.getDefaultConfiguration());
      win = new Window(container);
      gd.setFullScreenWindow(win);
      win.setIgnoreRepaint(true);
      container.pack();
      container.setResizable(false);
      container.setVisible(true);
      container.setIgnoreRepaint(true);
      container.addWindowListener(new WindowAdapter()
      {
         public void windowClosing(WindowEvent e)
         {
            System.exit(0);
         }
      });
      container.addKeyListener(new KeyInputHandler());
      win.addMouseListener(new MouseInputHandler());
      win.createBufferStrategy(2);
      strategy = win.getBufferStrategy();
      container.requestFocus();
      hud = new HUD();
      cursorChanger = new CursorChanger();
      cursorChanger.setCursor("default");
      iniBackground();
      startGame();
      gameLoop();
   }