diff --git a/journal/Readme.md b/journal/Readme.md
index f3d318116bf9aa640903b2ac9923eff9387a0fda..1d9a83f03d186331f38f111fd93a96c9114c6b05 100644
--- a/journal/Readme.md
+++ b/journal/Readme.md
@@ -1,6 +1,9 @@
 # Part 1： Writing a Markdown file
 
 
-# Part 2： Critical examination of a data analysis 
-## 1. About Calculating π
-My computer tells me that π is approximately **3.141592653589793**
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+# Part 2：Exercice 02
+### 2.1 Using a notebook
+## 2.1.1  About Calculating π
+My computer tells me that π is approximately **3.141592653589793**
+
+## 2.1.2  Using Buffon's Needle Method
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