diff --git a/_notebooks/2023-08-02-Mario-Tube.ipynb b/_notebooks/2023-08-02-Mario-Tube.ipynb
index c0a12cb..a7eaf55 100644
--- a/_notebooks/2023-08-02-Mario-Tube.ipynb
+++ b/_notebooks/2023-08-02-Mario-Tube.ipynb
@@ -22,7 +22,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
@@ -154,15 +154,14 @@
        "                player.position.y += 0.1\n",
        "                player.velocity.y = 0.0001\n",
        "                gravity = 0.2\n",
-       "\n",
-       "                if (player.position.y + player.height == tube.position.y + tube.height ||\n",
+       "            }\n",
+       "            if (player.position.y + player.height == tube.position.y + tube.height ||\n",
        "                    player.position.y + player.height <= tube.position.y ||\n",
        "                    player.position.x + player.width <= tube.position.x ||\n",
        "                    player.position.x >= tube.position.x + tube.width) {\n",
        "                        gravity = 1.5\n",
        "                    }\n",
        "                \n",
-       "            }\n",
        "        \n",
        "        if (\n",
        "                player.position.x + player.width<= tube.position.x &&\n",