private void moveBall(GOval ball, int height, int width, GRect paddle) {
	// Update ball position
	ball.setLocation(ball.getX() + vx, ball.getY() + vy);

	// Make sure ball Y is within the area
	if (ball.getY() <= 0) {
		ball.setLocation(ball.getX(), 0);
		vx += getVelOff();
		vy = Math.abs(vy);
	} else if (ball.getY() + BALL_RADIUS * 2 >= height) {
		// The ball has reached the bottom of the screen
		turn ++;
		ball.setLocation(width / 2, height / 2);
		// TODO: Wait for the player to be ready
	}

	// Make sure ball X is within the area
	if (ball.getX() <= 0) {
		ball.setLocation(0, ball.getY());
		vx = Math.abs(vx);
		vy += getVelOff();
	} else if (ball.getX() + BALL_RADIUS * 2 >= width) {
		ball.setLocation(width - BALL_RADIUS * 2, ball.getY());
		vx = -Math.abs(vx);
		vy += getVelOff();
	}

	// Get nearby objects
	GObject yn = getElementAt(ball.getX() + BALL_RADIUS, ball.getY());
	GObject yp = getElementAt(ball.getX() + BALL_RADIUS, ball.getY() + BALL_RADIUS * 2);
	GObject xn = getElementAt(ball.getX(), ball.getY() + BALL_RADIUS);
	GObject xp = getElementAt(ball.getX() + BALL_RADIUS * 2, ball.getY() + BALL_RADIUS);
	GObject center = getElementAt(ball.getX() + BALL_RADIUS, ball.getY() + BALL_RADIUS);

	// yn collision
	if (
		// check if yn exists
		yn != null &&
		// check if the ball's bottom surface is below or at yn's top surface
		ball.getY() <= yn.getY() + yn.getHeight() &&
		// check if the ball's x location is within yn's bounds
		ball.getX() + BALL_RADIUS * 2 >= yn.getX() && ball.getX() <= yn.getX() + yn.getWidth()
	) {
		// The ball has hit the top of the yn brick
		ball.setLocation(ball.getX(), yn.getY() + yn.getHeight());
		vx += getVelOff();
		vy = Math.abs(vy);
		remove(yn);
	}

	// yp collision
	if (
		// check if yp exists
		yp != null &&
		// check if the ball's top surface is above or at yp's bottom surface
		ball.getY() + BALL_RADIUS * 2 >= yp.getY() &&
		// check if the ball's x location is within yp's bounds
		ball.getX() + BALL_RADIUS * 2 >= yp.getX() && ball.getX() <= yp.getX() + yp.getWidth()
	) {
		// The ball has hit the bottom of the yp brick
		ball.setLocation(ball.getX(), yp.getY() - BALL_RADIUS * 2);
		vx += getVelOff();
		vy = -Math.abs(vy);
		remove(yp);
	}

	// xn collision
	if (
		// check if xn exists
		xn != null &&
		// check if the ball's left surface is left of or at xn's right surface
		ball.getX() <= xn.getX() + xn.getWidth() &&
		// check if the ball's y location is within xn's bounds
		ball.getY() + BALL_RADIUS * 2 >= xn.getY() && ball.getY() <= xn.getY() + xn.getHeight()
	) {
		// The ball has hit the right side of the xn brick
		ball.setLocation(xn.getX() + xn.getWidth(), ball.getY());
		vx = Math.abs(vx);
		vy += getVelOff();
		remove(xn);
	}

	// xp collision
	if (
		//check if xp exists
		xp != null &&
		// check if the ball's right surface is right of or at xp's left surface
		ball.getX() + BALL_RADIUS * 2 >= xp.getX() &&
		// check if the ball's y location is within xn's bounds
		ball.getY() + BALL_RADIUS * 2 >= xp.getY() && ball.getY() <= xp.getY() + xp.getHeight()
	) {
		// The ball has hit the left side of the xp brick
		ball.setLocation(xn.getX() - BALL_RADIUS * 2, ball.getY());
		vx = -Math.abs(vx);
		vy += getVelOff();
		remove(xp);
	}

	// center collisions
	if (center != null) {
		// top collision
		if (
			// check if the ball's bottom surface is below or at center's top surface
			ball.getY() <= center.getY() + center.getHeight() &&
			// check if the ball's x location is within center's bounds
			ball.getX() + BALL_RADIUS * 2 >= center.getX() && ball.getX() <= center.getX() + center.getWidth()
		) {
			// The ball has hit the top of the center brick
			ball.setLocation(ball.getX(), center.getY() + center.getHeight());
			vx += getVelOff();
			vy = Math.abs(vy);
			remove(center);
		}

		// bottom collision
		if (
			// check if the ball's top surface is above or at center's bottom surface
			ball.getY() + BALL_RADIUS * 2 >= center.getY() &&
			// check if the ball's x location is within center's bounds
			ball.getX() + BALL_RADIUS * 2 >= center.getX() && ball.getX() <= center.getX() + center.getWidth()
		) {
			// The ball has hit the bottom of the center brick
			ball.setLocation(ball.getX(), center.getY() - BALL_RADIUS * 2);
			vx += getVelOff();
			vy = -Math.abs(vy);
			remove(center);
		}

		// right collision
		if (
			// check if the ball's left surface is left of or at center's right surface
			ball.getX() <= center.getX() + center.getWidth() &&
			// check if the ball's y location is within center's bounds
			ball.getY() + BALL_RADIUS * 2 >= center.getY() && ball.getY() <= center.getY() + center.getHeight()
		) {
			// The ball has hit the right side of the center brick
			ball.setLocation(center.getX() + center.getWidth(), ball.getY());
			vx = Math.abs(vx);
			vy += getVelOff();
			remove(center);
		}

		// left collision
		if (
			// check if the ball's right surface is right of or at center's left surface
			ball.getX() + BALL_RADIUS * 2 >= center.getX() &&
			// check if the ball's y location is within center's bounds
			ball.getY() + BALL_RADIUS * 2 >= center.getY() && ball.getY() <= center.getY() + center.getHeight()
		) {
			// The ball has hit the left side of the center brick
			ball.setLocation(center.getX() - BALL_RADIUS * 2, ball.getY());
			vx = -Math.abs(vx);
			vy += getVelOff();
			remove(center);
		}
	}
}

// generates a random velocity offset
public static double getVelOff() {
	return RandomGenerator.getInstance().nextDouble(-1.5, 1.5);
}