test

public void hexagonRace(VehicleTurtle vt1, VehicleTurtle vt2) {
        vt1.moveTo(500, 500);
        vt2.moveTo(500, 500);
        vt1.drawHexagonOfLength(30);
        vt2.drawHexagonOfLength(30);

    }

    public void race2Vehicles() {
        int index1 = (int) (Math.random() * vehicles.size());
        int index2 = -1;

        while (index2 == -1) {
            int newIndex = (int) (Math.random() * vehicles.size());
            if (newIndex != index1) {
                //got one!
                index2 = newIndex;
                break;
            }
        }
        hexagonRace(vehicles.get(index1), vehicles.get(index2));
    }