fix selection

ipyvizzustory_demo.ipynb

@@ -28,7 +28,7 @@
    "source": [
     "# configure default value\n",
     "\n",
-    "show = 'complex'"
+    "selected = [\"animation\"]"
    ]
   },
   {
@@ -133,9 +133,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "if show == \"animation\":\n",
+    "if \"animation\" is selected:\n",
     "    story.play()\n",
-    "if show == \"code\":\n",
+    "if \"code\" is selected:\n",
     "    display_html(HTML(html))"
    ]
   }