<https://developers.google.com/maps/documentation/javascript/directions>

here is my code to show path

```
function calcRoute() {
  var request = {
          origin: "Chicago, IL",
          destination: "Los Angeles, CA",
          waypoints: [
            {
              location:"Joplin, MO",
              stopover:false
            },{
              location:"Oklahoma City, OK",
              stopover:true
            }],
          provideRouteAlternatives: false,
          travelMode: google.maps.TravelMode.DRIVING,
          unitSystem: google.maps.UnitSystem.IMPERIAL
        };
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
    }
  });
}

```

How to change the path color the default is blue?