Open Street Maps Leaflet Move Marker with Tweens

<!DOCTYPE html>
<html lang="en">
  <head>
    <title></title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />
    <style>
@media only screen and (min-width: 600px) {
  body {
    margin-right: 200px;
    margin-left: 200px;
    margin-top: 20px;
  }
}
    #map {
      height: 100%;
    }


    html, body {
      height: 100%;
      margin: 0px;
    }
    </style>
  </head>

  <body>
    <div id="map"> </div>
  </body>
  <script type="text/javascript" src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>

  <script type="module">
    import {Tween, Easing} from 'https://unpkg.com/@tweenjs/tween.js@23.1.3/dist/tween.esm.js'

  var zoom = 15;

  const coords = [
    {lat: 26.1635173, lng: -81.5693298},
    {lat: 26.1635273, lng: -81.5584298},
    {lat: 26.1605273, lng: -81.5584298},
    {lat: 26.1505273, lng: -81.5504298},
    {lat: 26.1605273, lng: -81.5594298},
    {lat: 26.1635173, lng: -81.5693298}
  ]
  var map = L.map('map').setView([coords[0].lat,coords[0].lng], zoom);

  L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
    maxZoom: 19,
    attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
  }).addTo(map);


  var marker = L.marker([coords[0].lat,coords[0].lng]).addTo(map);
  var i = 0;

  moveMarker();

  function moveMarker(){
    i++;

    if(i > coords.length){i=1};
    let tween = new Tween(coords[0]); // Create a new tween that modifies 'coords'.
    tween.to(coords[i], 1000) // Move over 5 seconds.
    tween.easing(Easing.Quadratic.InOut) // Use an easing function to make the animation smooth.
    tween.onUpdate(() => {
      // Called after tween.js updates 'coords'.
      let newLatLng = L.latLng(coords[0].lat,coords[0].lng);
      marker.setLatLng(newLatLng);// move marker
    })
    tween.start(); // Start the tween immediately.
      tween.onComplete(() =>{
        moveMarker();
      });
    // Setup the animation loop.
    function animate() {
      tween.update()
      requestAnimationFrame(animate)
    }
    requestAnimationFrame(animate)
  }
  </script>
</html>