diff --git a/Electronic/Lecture 1.md b/Electronic/Lecture 1.md
index 5b9322f..756a9d4 100644
--- a/Electronic/Lecture 1.md	
+++ b/Electronic/Lecture 1.md	
@@ -20,7 +20,9 @@ $R_{P}=\frac{R_{3}\times{R_{2}}}{{R_{3}+R_{2}}}$
 - A branch is a link between 2 points in the diagram
 - A node is a point in the diagram linked to at lease 3 branches
 - A loop is a draw from a point in the diagram to itself. 
-	Exemple: 
+> ⚠️ In a loop we don't use the same path twice or more
+
+Exemple: 
 ```mermaid
 flowchart LR
 	C --> D --> B --> C