diff --git a/other/two_dimensional_materials/layer_on_a_surface.ipynb b/other/two_dimensional_materials/layer_on_a_surface.ipynb
index 59942117..0d05d495 100644
--- a/other/two_dimensional_materials/layer_on_a_surface.ipynb
+++ b/other/two_dimensional_materials/layer_on_a_surface.ipynb
@@ -24,24 +24,6 @@
     "print(tkinter.Tcl().eval('info patchlevel'))\n"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 11,
-   "id": "c34ddf68-341f-4f81-89de-9a314dee52c6",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from ase.visualize import view\n",
-    "import ase.build\n",
-    "show = False\n",
-    "\n",
-    "crystal = ase.build.bulk(\"Ni\", cubic=True)\n",
-    "if show : view(crystal*[4,4,1])\n",
-    "\n",
-    "graphene = ase.build.graphene()\n",
-    "if show : view(graphene*[2,2,1])\n"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 129,
@@ -49,7 +31,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# data\n",
+    "# data that comes from JS, here are some examples\n",
     "global data\n",
     "substrate_poscars = [\"\"\"Ni4\n",
     "1.0\n",
@@ -171,6 +153,7 @@
     "from ase import Atoms\n",
     "from ase.build import surface\n",
     "from ase.io import read, write\n",
+    "from ase.visualize import view\n",
     "import io\n",
     "from operator import itemgetter\n",
     "\n",