import java.util.concurrent.locks.*;
import java.util.concurrent.*;

isDead = false;
bufferStrat = null;

Main(){
	frame = new JFrame();
	
	frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
	frame.setSize(640,480);
	frame.setLocationRelativeTo(null);
	frame.setVisible(true);
	
	frame.createBufferStrategy(2);
	bufferStrat = frame.getBufferStrategy();
	
	frame.addKeyListener(super.keyListener);
	
	return frame;
}

Render(){
	discs = new LinkedList();
	
	addDisc(obj){
		discs.add(obj);
	}
	
	render(){
		bufferStrat.show();
		gfx = (Graphics2D)bufferStrat.getDrawGraphics();
		gfx.setColor(Color.BLUE);
		gfx.fillRect(0,0,frame.getWidth(),frame.getHeight());
		gfx.translate(frame.getWidth()/2, frame.getHeight()/2);
		
		for(d : discs){
			d.draw(gfx);
		}
		
		gfx.dispose();
	}
	
	return this;
}

keyListener = new KeyListener(){
	keyPressed(evt){
		if(evt.getKeyCode() == KeyEvent.VK_ESCAPE){
			isDead = true;
			frame.dispose();
		}
	}
	
	invoke(method, args){}
};