px 2px 9px 1px #444444;
    }
    #layers {
      right: 5px;
      top: 5px;
    }
  </style>
</head>
<body>
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-NP4W837"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager (noscript) -->

<div id='map'></div>

<div id='instr' style="max-width: 50%;" onClick="reset()"></div>
<div id='sw_container'></div>

<script>
var startMarker;
var endMarker;