diff --git a/2.Ghost-Writing.md b/2.Ghost-Writing.md
index a530d1f..89343ae 100644
--- a/2.Ghost-Writing.md
+++ b/2.Ghost-Writing.md
@@ -4,6 +4,7 @@
 <img src="https://git.le-club-des-sans-sujets.org/gauthiier/Revisiting-Concepts-Notations-Software-Art/media/branch/main/img/love-letter.png" alt="autopilot creativity" width="80%"/>	
 </p>
 
+## Sketch: 2.0 Array + Index
 
 ```javascript
 // Array + Index!
@@ -28,8 +29,21 @@ function keyTyped() {
 // Reference: https://p5js.org/reference/
 ```
 
+### 🤔 What are indices?
+
 ```javascript
  ["David", "Karin", "Sigrid", "Nanna", "Laura", "Maaikke"]  <--- Array (var NAMES)
      |        |         |        |         |        |
      0        1         2        3         4        5		<--- indices (var INDEX)
-```
\ No newline at end of file
+```
+
+### 📚 Exercice
+
+1. Modify sketch 2.0 so that:
+* When key 'k' is pressed then "Hi Karin!" is printed on the console
+* When key 's' is pressed then "Hi Sigrid!" is printed on the console
+* When key 'n' is pressed then "Hi Nanna!" is printed on the console
+* When key 'm' is pressed then "Hi Maaike!" is printed on the console
+
+2. Modify sketch 2.0 so that:
+* Every time key 'x' is pressed then print the name of the following person in the array ("Hi David!", "Hi Karin!", "Hi Sigrid!", and so forth)
\ No newline at end of file