Leaflet Squirrel - Step 1

Add Leaflet starter code (4-5)
Specify the center lat/long of our starting view (16)
Add our tile layer URL from MapStack

Here's the long URL from Mapstack we're using to call our tiles (19-25): http://{s}.sm.mapstack.stamen.com/((naip,$fff[difference],$fff[@60],$fff[hsl-saturation@90])[multiply],(mapbox-water,$fff[difference],$000[@60],$090d11[hsl-color]))/{z}/{x}/{y}.png

<html>
<head>
  <title>Leaflet Squirrel - Step 1</title>
  <link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css"/>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.3/leaflet.min.js"></script>
  <style>
    #map{ height: 100% }
  </style>
</head>
<body>
  <div id="map"></div>

// initialize the map centered on the geographic center of the lower 48
  var map = L.map('map').setView([39.833, -98.35], 4);

// load tile layer from mapstack we copied earlier and use the required attribution
  L.tileLayer(
    'https://{s}.sm.mapstack.stamen.com/((naip,$fff[difference],$fff[@60],$fff[hsl-saturation@90])[multiply],(mapbox-water,$fff[difference],$000[@60],$090d11[hsl-color]))/{z}/{x}/{y}.png', {
        attribution: 'Map tiles by <a href=”https://stamen.com”>Stamen Design</a>, under <a href=”https://creativecommons.org/licenses/by/3.0”>CC BY 3.0</a>. Data by <a href=”https://openstreetmap.org”>OpenStreetMap</a>, under <a href=”https://creativecommons.org/licenses/by-sa/3.0”>CC BY SA</a>',
      // we want to limit the scrollability
      maxZoom: 19,
      minZoom: 4
    }).addTo(map);

</script>
</body>
</html>

Modified http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js to a secure url

https://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js