Maps API v3 SVG markers: random Tesla Model S

HTML

<script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<div id="map-canvas"></div>

CSS

html, body, #map-canvas {
  margin: 0; padding: 0;
  position: absolute;
  height: 100%; 
  width: 100%;
}

JavaScript

var map;
var polyLine;
var polyOptions;

var q = {};
function parse(x,k,v) { q[decodeURIComponent(k)] = decodeURIComponent(v); }
(location.hash||location.search).slice(1).replace(/([^=&]*)=([^&]*)/g, parse);

function initialize() {
    var where, mapOptions = {
        zoom: q.zoom || 5,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        center: where = new google.maps.LatLng(+(q.lat || 0), +(q.lng || 0))
    };

    map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

    var lineSymbol = {
        path: google.maps.SymbolPath.FORWARD_OPEN_ARROW,
        scale: 1.5
    };

    polyOptions = {
        strokeColor: '#0026b3',
        strokeOpacity: 1.0,
        strokeWeight: 1,
        geodesic: true,
        icons: [{
            icon: lineSymbol,
            repeat: '100px'
        }],
        zIndex: 10
    };

    polyLine = new google.maps.Polyline(polyOptions);
    polyLine.setMap(map);
    
    google.maps.event.addListener(map, 'click', function(event) {
        addPoint(event);
    });

    if (q.lat && q.lng) {
      addPoint({ latLng: where })
    }
}

function addPoint(event) {
 
    var path = polyLine.getPath();
    path.push(event.latLng);

    var icon = {
        //path: "M70,25 45,50 69,74 69,120 71,120 71,74 95,50", // tesla:
        rotation: (720 + (+(q.angle||0)) - 90) % 360,
        path: "M" +...