diff --git a/app/covid-calculator.ipynb b/app/covid-calculator.ipynb
index 67ae19c1..05c89adb 100644
--- a/app/covid-calculator.ipynb
+++ b/app/covid-calculator.ipynb
@@ -2,26 +2,31 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 20,
    "metadata": {
     "collapsed": true
    },
    "outputs": [],
    "source": [
-    "from ipywidgets import Label, Layout, Text, VBox"
+    "import ipywidgets as w"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 28,
+   "metadata": {
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
    "outputs": [
     {
      "data": {
-      "text/plain": "VBox(children=(Label(value='CARA Covid Calculator', layout=Layout(width='100%')), Text(value='', description='…",
+      "text/plain": "VBox(children=(Label(value='CARA Covid Calculator'), Text(value='', placeholder='Simulation name'), Text(value…",
       "application/vnd.jupyter.widget-view+json": {
        "version_major": 2,
        "version_minor": 0,
-       "model_id": "81c2850558b347f0b3040231351aba9f"
+       "model_id": "9da199408f34408ca5ede050abe7858b"
       }
      },
      "metadata": {},
@@ -29,22 +34,26 @@
     }
    ],
    "source": [
-    "title = Label(\"CARA Covid Calculator\")\n",
-    "simulation_text = Text(\n",
-    "    placeholder=\"E.g. Workshop without masks\",\n",
-    "    description=\"Simulation name: \"\n",
-    ")\n",
-    "room_number_text = Text(\n",
-    "    placeholder=\"E.g. 17/R-033\",\n",
-    "    description=\"Room number: \"\n",
-    ")\n",
+    "intro = w.VBox(children=(w.Label(\"CARA Covid Calculator\"),\n",
+    "                         w.Text(placeholder=\"Simulation name\"),\n",
+    "                         w.Text(placeholder=\"Room number\")))\n",
     "\n",
-    "intro = VBox(\n",
-    "    children=(title, simulation_text, room_number_text)\n",
-    ")\n",
-    "\n",
-    "intro\n"
+    "intro"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 29,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Text(value='test', placeholder='Simulation name')\n"
+     ]
+    }
    ],
+   "source": [],
    "metadata": {
     "collapsed": false,
     "pycharm": {
@@ -62,16 +71,16 @@
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.6"
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 0
+ "nbformat_minor": 1
 }
\ No newline at end of file