let tour = new Shepherd.Tour({
  defaultStepOptions: {
    classes: 'shepherd-theme-arrows'
  }
});

tour.addStep('example', {
  title: 'Example Shepherd',
  text: 'Creating a Shepherd is easy too! Just create ...',
  attachTo: '.hero-example bottom',
  advanceOn: '.docs-link click'
});

tour.start();