code: public Helix getByLowestAngle() {
  		double angle = Double.MAX_VALUE;
  		Helix lowest = null;
  		for (Helix helix: helices) {
  			if (helix.getAngle() < angle) {
  				angle = helix.getAngle();
  				lowest = helix;
  			}
  		}
  		return lowest;
  	}
docs: /*
  Returns Helix with lowest twist angle