diff --git a/css - the complete guide/3. diving_deeper.md b/css - the complete guide/3. diving_deeper.md
index 8beeac6..6cbf902 100644
--- a/css - the complete guide/3. diving_deeper.md	
+++ b/css - the complete guide/3. diving_deeper.md	
@@ -3,6 +3,7 @@
 
 ## Introducing the CSS Box Model
 
+```
  _______________________________________
 |                                       |
 |           margin (transparent)        |
@@ -22,6 +23,7 @@
 
           |    element width    |
 |               box width               |
+```
 
 
 ## Understanding the CSS Box Model