Update how-to-use-codedex-alongside-your-cs-classes.mdx

Author: sonnynomnom

blogs/2025/how-to-use-codedex-alongside-your-cs-classes.mdx

@@ -137,6 +137,8 @@ If you are attending an online school or having a hard time meeting other CS stu
 
 ## Monthly Challenges
 
+![October Monthly Challenge](https://i.imgur.com/W3U6Ih2.gif)
+
 Monthly Challenge: Every month, we challenge you to create something creative, unique, or even weird as you naviagte or learn a new technology or software. Plus, you can even earn a prize or two. 
 
 This month, we have a Personal Portfolio challenge...