/* Creates percolation cluster with probability p and computes mass distribution */
/**
* Renders (draws) the panel immediately.
*
* <p>Unlike repaint, the render method is draws the panel within the calling method's thread.
* This method is called automatically if the frame is animated.
*/
public void render() {
if (drawingPanel != null) {
drawingPanel.render(); // simulations should render their panels at every time step
}
}