class myCanvas extends Canvas{
	public void paint(Graphics g){
		drawSlope(g);
	}
	public void drawSlope(Graphics g){
		g.drawLine(20,180-(int)(260/Math.sqrt(3)),20,180);
		g.drawLine(20,180-(int)(260/Math.sqrt(3)),280,180);
		g.drawLine(20,180,280,180);
	}
	public void drawBall(double x,double y){
		Graphics g=getGraphics();
		g.drawOval((int)(x-5)+20,(int)(y-5)+23,10,10);
	}
	public void draw(){
		Graphics g=getGraphics();
		g.clearRect(0,0,getSize().width,getSize().height);
		drawSlope(g);
	}
	
}