simple symbol simple marker simple

circle.js

require([
  "esri/map",
  "esri/request",
  "esri/geometry/Point",
  "esri/symbols/SimpleMarkerSymbol",
  "esri/graphic",
  "dojo/domReady!"],

  function(Map, request, Point, SimpleMarkerSymbol, Graphic) {

  window.map = new Map("mapDiv", {
    center: [-122.68,45.53],
    zoom: 11,
    basemap: "gray"
  });

  var strokejson = {
    "color":[0,0,0,255],
    "width":1,
    "type":"esriSLS",
    "style":"esriSLSSolid"
  };

  var symboljson = {
    "color":[255,255,255,64],
    "size":12,
    "angle":0,
    "xoffset":0,
    "yoffset":0,
    "type":"esriSMS",
    "style":"esriSMSCircle",
    "outline": strokejson
  };

  window.point = new Point(-122.68, 45.53);

  var thisPoint = {
    "geometry": point,
    "symbol": symboljson
  };

  var finishedPoint = new Graphic(thisPoint);

  map.on('load', function () {
    map.graphics.add(finishedPoint);
  });
});