How can I place 3 markers with user input instead of 1 on Google Maps?

I’m trying to learn some new things with Javascript. This time with Google Maps.

I already can place 1 marker with the user input and I can also give the marker a name. The next step that I want to do is that I can place 3 markers (no more than 3) with the same input field and button that I use now.

I’m stuck since 2 days and I already tried some things but I can’t figure it out.
I hope someone can help me with my code, thanks for the effort!

index.html

                         <input id="place" type="text">
                            </div>
                            <div>
                                Name Marker<input id="namemarker" type="text">
                                <div>
                                    <button id="search">search</button>
                                </div>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
            <div>
                <div>
                    <div>
                        <h1>MAP</h1>
                    </div>
                </div>
                <div>
                    <div class="divmap"></div>
                </div>
            </div>
        </div>
    </div>

<script src="js/main.js"></script>

</body>

</html>

HTML:

main.js

var posOptions =     { enableHighAccuracy: false,
    maximumAge: 0,
    timeout: 5000
};

/**  * Get the current location of the user  */
function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(showLocation, handleError, posOptions);
    } else {
        console.log ('Not supported');
    }
}

/**  * Show current location coords of the user  *
*  @param position object with position info  */
function showLocation(position) {
    console.log(position.coords.latitude, position.coords.longitude );
}

function handleError(error) {
    console.log(error.code, error.message );
}



getLocation();

var marker;
var map;
var namemarker;
var API_KEY = "AIzaSyBHlzEXk1cGO65POSXz_AYW2DDmKuF6Fv4";
var mapScript = document.createElement('script');
mapScript.setAttribute('src', 'https://maps.googleapis.com/maps/api/js?key='+API_KEY+'&callback=initMap' );
mapScript.setAttribute('async', '' );
mapScript.setAttribute('defer', '' );
document.querySelector('body').appendChild(mapScript);
function initMap() {
    navigator.geolocation.getCurrentPosition(showMap, handleError);
}

var divMap = document.querySelector(".divmap");
function showMap(pos) {
    divMap.style.width = '500px';
    divMap.style.height = '500px';
    map = new google.maps.Map(divMap, {
        center:{
            lat: pos.coords.latitude,
            lng: pos.coords.longitude,
        },
        zoom: 16
    });

    marker = new google.maps.Marker({
        position: {
            lat: pos.coords.latitude,
            lng: pos.coords.longitude,},
        map:map,
        title:namemarker,
    });


}

var search = document.querySelector('#search');

search.addEventListener("click", function (ev) {
    ev.preventDefault();
    showPlace();
},false);

function showPlace() {
    var loc = document.querySelector('#place');
    namemarker = document.querySelector('#namemarker');
    console.log(loc.value);

    var reqUrl = "https://maps.googleapis.com/maps/api/geocode/json?address="+loc.value+"&key="+API_KEY;

    fetch(reqUrl)
        .then(function(response) {
            return response.json();
        })
        .then(function (locJson) {
            console.log(locJson);
            var pos = locJson.results[0].geometry.location;

            map.panTo(pos);
            marker.setPosition(pos);
            marker.setTitle(namemarker.value);

        });
}

Code (JavaScript):