Show empty graphs on startup

daqviewer/daqviewer.py

@@ -126,7 +126,15 @@ def csv_to_json(contents, name):
               [Input('json-storage', 'children')])
 def read_json_data(json_data):
     if json_data is None:
-        return html.Div([])
+        elements = html.Div([
+            dcc.Graph(),
+            html.Div([
+                html.Div([dcc.Graph()], className='six columns'),
+            ]),
+            html.Div()
+        ])
+
+        return elements
 
     info = json.loads(json_data)['info']
     df = pd.read_json(json.loads(json_data)['timeseries'], orient='table')