thanks Chris. Here it is:
<!DOCTYPE html>
<html>
<head>
<title>Create a Map</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="http://js.arcgis.com/3.12/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="http://js.arcgis.com/3.12/esri/css/esri.css">
<style>
html, body, #mapDiv{
padding: 0;
margin: 0;
height: 100%;
}
</style>
<script src="http://js.arcgis.com/3.12/"></script>
<script>
var map;
require(["esri/map", "dojo/domReady!"], function(Map) {
map = new Map("mapDiv", {
center: [-56.049, 38.485],
zoom: 3,
basemap: "streets"
});
});
</script>
</head>
<body class="claro">
<div id="mapDiv"></div>
</body>
</html>
