diff --git a/MininaVD/docs2/data2/visualizationObserver.ipynb b/MininaVD/docs2/data2/visualizationObserver.ipynb
new file mode 100644
index 0000000..41ff7bc
--- /dev/null
+++ b/MininaVD/docs2/data2/visualizationObserver.ipynb
@@ -0,0 +1,43 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8998420f-2c73-4f8a-a102-cc403777f3e9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from abc import ABC, abstractmethod\n",
+    "\n",
+    "class Observer(ABC):\n",
+    "    \"\"\"Интерфейс наблюдателя (паттерн Observer).\"\"\"\n",
+    "    \n",
+    "    @abstractmethod\n",
+    "    def update(self, event: str) -> None:\n",
+    "        \"\"\"Обработчик события.\"\"\"\n",
+    "        pass"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python [conda env:base] *",
+   "language": "python",
+   "name": "conda-base-py"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}