diff --git a/src/cljs/googlefit-api-test/core.cljs b/src/cljs/googlefit-api-test/core.cljs
index abb15c6..28a96b6 100644
--- a/src/cljs/googlefit-api-test/core.cljs
+++ b/src/cljs/googlefit-api-test/core.cljs
@@ -1,6 +1,5 @@
 (ns googlefit-api-test.core
-  (:require [goog.dom :as gdom]
-            [reagent.core :as r]))
+  (:require [reagent.core :as r]))
 
 (enable-console-print!)
 
@@ -10,15 +9,23 @@
 
 (println fragment-string)
 
-(def xhr (js/XMLHttpRequest.))
-
-(.open xhr "GET" (str "https://www.googleapis.com/fitness/v1/users/me/dataSources" fragment-string) true)
-
-(. xhr send)
-
-(println (.-status xhr))
-
-;; (set! (. xhr onreadystatechange) (fn [] (js/console.log (.response xhr))))
+(let [xhr (js/XMLHttpRequest.)]
+  (set!
+   (.-onreadystatechange xhr)
+   (fn []
+     (when
+         (and
+          (= (.-readyState xhr) 4)
+          (= (.-status xhr) 200)
+       (js/console.log (str "Response = " (.-response xhr)))))))
+  ;; (.open xhr "GET" (str "https://www.googleapis.com/fitness/v1/users/me/dataSources?" fragment-string) true)
+  (.open xhr "POST" (str "https://www.googleapis.com/fitness/v1/users/me/dataset:aggregate?" fragment-string))
+  (.setRequestHeader xhr "Content-Type" "application/json")
+  (.send xhr (.stringify js/JSON (clj->js
+                                  {"aggregateBy" [{"dataSourceId" "derived:com.google.step_count.delta:com.google.android.gms:estimated_steps"}]
+                                   "bucketByTime" {"durationMillis" 86400000}
+                                   "startTimeMillis" 1591149600000
+                                   "endTimeMillis" 1591322400000}))))
 
 (defn appended-container [target]
   (let [oauth2-end-point "https://accounts.google.com/o/oauth2/v2/auth?scope=https%3A//www.googleapis.com/auth/fitness.activity.read&include_granted_scopes=true&response_type=token&redirect_uri=http%3A//localhost%3A9500/tokenpage&client_id=857819587666-2pm3q0sv9lvmv697afm0k6jblgvtjon9.apps.googleusercontent.com"
@@ -52,3 +59,4 @@
 (r/render-component
  [oauth-body]
  (appended-container (. js/document (getElementById "app"))))
+