JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://maps.googleapis.com/maps/api/js?sensor=false&amp;libraries=geometry,places&amp;ext=.js"></script>
<div id="map-canvas" style="border: 2px solid #3872ac;"></div>

CSS

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

JavaScript

var map;
var angle = 0;
var marker;
var icon = {
            path: "M 0 5 L 20 5 L 10 40 z",
            scale: 1,
            strokeWeight: 2,
            fillColor: '#009933',
            fillOpacity: 0.001,
            anchor: new google.maps.Point(10, 20)
        };
function init() {
    var startLatLng = new google.maps.LatLng(50.124462, -5.539994);

    map = new google.maps.Map(document.getElementById('map-canvas'), {
        center: startLatLng,
        zoom: 12
    });

    var ptMarker = new google.maps.Marker({
        position: new google.maps.LatLng(50.124462, -5.539994),
        map: map,
        icon: {
            url: "https://maps.gstatic.com/intl/en_us/mapfiles/markers2/measle.png",
            size: new google.maps.Size(7, 7),
            anchor: new google.maps.Point(4, 4)
        }
    });
    marker = new google.maps.Marker({
        position: new google.maps.LatLng(50.124462, -5.539994),
        icon: icon
    });
    marker.setMap(map);
    var circleMarker = new google.maps.Marker({
        position: new google.maps.LatLng(50.124462, -5.539994),
        map: map,
        icon: {
            path: google.maps.SymbolPath.CIRCLE,
            scale: 24,
            strokeWeight: 2,
            fillColor: '#009933',
            fillOpacity: 0.001,
            anchor: new google.maps.Point(0, 0)
        }
    });
    
    setInterval(function () {
        angle += 30;
        icon.rotation = angle;
        marker.setIcon(icon);
    }, 1000);

}

google.maps.event.addDomListener(window, 'load', init);