import java.util.ArrayList;

public class BlobsDriver {

	public static void main(String[] args) {
		ArrayList<Blob> blobs = new ArrayList<Blob>();
		blobs.add(new Wanderer(10,10));
		blobs.add(new Bouncer(20,30,800,600));
		blobs.get(0).step(); // => the wanderer
		blobs.get(1).step(); // => the bouncer
		blobs.size(); // => 2
	}
}