mapbox outdoor circles

<!doctype html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<title>mapboxgl</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
 	<script src="https://d3js.org/d3.v4.js"></script>
	<script src='https://api.mapbox.com/mapbox-gl-js/v0.26.0/mapbox-gl.js'></script>
	<link href='https://api.mapbox.com/mapbox-gl-js/v0.26.0/mapbox-gl.css' rel='stylesheet' />

var style = {};
		style.outdoor = 'mapbox://styles/larsvers/civ13lwyh01lc2hpbgr74oyus';
		style.satellite = 'mapbox://styles/larsvers/civ2tags1000k2iodkxhum370';

mapboxgl.accessToken = 'pk.eyJ1IjoibGFyc3ZlcnMiLCJhIjoiY2l2MTAxY2pjMDA0aTJ6dDVudXIyeTBrayJ9.-zz4eMd83tjFyz4OITkZFw';
		var map = new mapboxgl.Map({
		    container: 'map',
		    style: style.outdoor,
		   	center: [-0.12, 51.51],
				zoom: 4,
				pitch: 50
		});

map.on('load', function() {

map.addSource("point", {
		    "type": "geojson",
		    "data": {
				  "type": "FeatureCollection",
				  "features": [{
				      "type": "Feature",
				      "geometry": {
				          "type": "Point",
				          "coordinates": [-0.1278, 51.5074]
				      }
				  }, {
				      "type": "Feature",
				      "geometry": {
				          "type": "Point",
				          "coordinates": [8.4037, 49.0069]
				      }
				  }]
				}
		  });

map.addLayer({
		    "id": "point-colour",
		    "type": "circle",
		    "source": "point",
		    "paint": {
		        "circle-radius": 40,
		        "circle-color": "#f00",
		        "circle-blur": 0,
		        "circle-opacity": 0.5,
		        "circle-pitch-scale": "viewport"
		    }
		  });

map.addLayer({
		    "id": "point-white",
		    "type": "circle",
		    "source": "point",
		    "paint": {
		        "circle-radius": 30,
		        "circle-color": "#fff",
		        "circle-blur": 0.4,
		        "circle-opacity": 1
		    }
		  });

map.addControl(new mapboxgl.NavigationControl());

}); // map.on('load')

</script>

</body>
</html>

Modified http://d3js.org/d3.v4.js to a secure url

https://d3js.org/d3.v4.js

https://api.mapbox.com/mapbox-gl-js/v0.26.0/mapbox-gl.js