private void setGonzo(int a){
		switch(a){
			case 1: gonzo = new onebrush(); break;
			case 2: gonzo = new twobrush(); break;
			case 3: gonzo = new threebrush(); break;
			case 4: gonzo = new gliderbrush(); break;
			case 5: gonzo = new rpentbrush(); break;
			case 6: gonzo = new evbrush(); break;
			case 7: gonzo = new vonNeumannbrush(); break;
		}
	}