diff --git a/simple_loop.ipynb b/simple_loop.ipynb
index bb1e296..9b808c0 100644
--- a/simple_loop.ipynb
+++ b/simple_loop.ipynb
@@ -2,14 +2,13 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "0\n",
       "1\n",
       "2\n",
       "3\n",
@@ -18,7 +17,8 @@
       "6\n",
       "7\n",
       "8\n",
-      "9\n"
+      "9\n",
+      "10\n"
      ]
     }
    ],
@@ -26,7 +26,10 @@
     "import numpy as np\n",
     "import pandas as pd\n",
     "\n",
-    "for i in range(10):\n",
+    "i = 0\n",
+    "\n",
+    "while i < 10:\n",
+    "    i += 1 \n",
     "    print(i)"
    ]
   }
diff --git a/useless_nb_3.ipynb b/useless_nb_3.ipynb
new file mode 100644
index 0000000..0773b10
--- /dev/null
+++ b/useless_nb_3.ipynb
@@ -0,0 +1,54 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "blabla"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.3"
+  },
+  "latex_envs": {
+   "LaTeX_envs_menu_present": true,
+   "autoclose": false,
+   "autocomplete": true,
+   "bibliofile": "biblio.bib",
+   "cite_by": "apalike",
+   "current_citInitial": 1,
+   "eqLabelWithNumbers": true,
+   "eqNumInitial": 1,
+   "hotkeys": {
+    "equation": "Ctrl-E",
+    "itemize": "Ctrl-I"
+   },
+   "labels_anchors": false,
+   "latex_user_defs": false,
+   "report_style_numbering": false,
+   "user_envs_cfg": false
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}