diff --git a/2026/celery/slides/00-intro.md b/2026/celery/slides/00-intro.md
index 0c0f9b3..b2745d3 100644
--- a/2026/celery/slides/00-intro.md
+++ b/2026/celery/slides/00-intro.md
@@ -1,5 +1,9 @@
 # Celery
-<!-- .slide: data-background-image="./assets/celery.jpg" -->
+
+https://gricad-gitlab.univ-grenoble-alpes.fr/tienyoun/presentations
+
+<img src="./assets/celery.jpg">
+
 
 ---
 
diff --git a/2026/celery/slides/02-progressbar.md b/2026/celery/slides/02-progressbar.md
index e726fe0..be36ec7 100644
--- a/2026/celery/slides/02-progressbar.md
+++ b/2026/celery/slides/02-progressbar.md
@@ -131,6 +131,13 @@ https://docs.celeryq.dev/en/main/reference/celery.events.html
 
 
 
+### Coté Worker
+- celery.events.EventDispatcher 📢
+- celery.events.EventReceiver 👂
+
+
+
+
 ### Coté Worker
 <!-- .slide: data-auto-animate -->
 
@@ -187,10 +194,10 @@ class PtfTask(AbortableTask):
 ```python
 @shared_task(name="crawler.tasks.toto", base=PtfTask, bind=True)
 def print_toto(self, toto = "toto"):   
-    
+    meta = {"current": 0, "total": len(toto)}
     # Initialize progress bar at 0
     self.update_state(
-        meta={"current": index, "total": len(toto)},
+        meta=meta,
         state=states.STARTED,
     )
     
@@ -199,8 +206,9 @@ def print_toto(self, toto = "toto"):
         print(letter)
         
         # Update progress bar
+        meta["current"] = index
         self.update_state(
-            meta={"current": index, "total": len(toto)},
+            meta=meta,
             state=states.STARTED,
         )
 ```
diff --git a/start.sh b/start.sh
index d7714c8..fe5a733 100755
--- a/start.sh
+++ b/start.sh
@@ -1,4 +1,6 @@
 podman run --rm \
+-e SHOW_NOTES_FOR_PRINTING=true \
 -e ADDITIONAL_SCRIPT='<script src="./assets/mermaid.js"></script>' \
 -e ADDITIONAL_PLUGINS="RevealMermaid" \
--p 28080:8000 -p 35729:35729 -v $(pwd)/2026/celery/slides:/reveal/docs/slides -v $(pwd)/2026/celery/assets:/reveal/assets cloudogu/reveal.js:dev
+-e ADDITIONAL_REVEAL_OPTIONS="center: false," \
+--network=host -v $(pwd)/2026/celery2/slides:/reveal/docs/slides -v $(pwd)/2026/celery2/assets:/reveal/assets cloudogu/reveal.js:dev