void animateBall()
	{
		switch(animCoun)
		{
		case 0:
			img=imgAnim01;
			break;
		case 20:
			img=imgAnim02;
			break;
		case 40:
			img=imgAnim03;
			break;
		case 60:
			img=imgAnim04;
			break;
		case 80:
			MetalBreaker.nBalls--;
			ballAlive=false;
		}
		animCoun++;
	}