diff --git a/README.md b/README.md
index e68194b..4f4e993 100644
--- a/README.md
+++ b/README.md
@@ -146,4 +146,10 @@ svg.edge > line {
 
 ### Result
 ![graph 2.0.0 preview](preview/graph_demonstration_2_0_0.gif)<br><br>
-[Try it on CodePen](https://codepen.io/mirzaev-sexy/pen/Rwyxprz)
\ No newline at end of file
+[Try it on CodePen](https://codepen.io/mirzaev-sexy/pen/Rwyxprz)
+
+## Important fragments of the code
+Iterating over nodes<br>
+![iterating over nodes](preview/code/1.png)<br><br>
+Pushing and pulling<br>
+![pushing and pulling](preview/code/2.png)