diff --git a/master.py b/master.py
index 5717a44..58953ef 100644
--- a/master.py
+++ b/master.py
@@ -8,6 +8,11 @@
 Master Python script that will trigger other scripts at every chosen time pace
 This script is triggered as a systemd service used as an alternative to cronjobs
 
+Attention: 
+    to do -> prevent SARA R4 Script to run again if it's taking more than 60 secs to finish (using a lock file ??) 
+
+First time: need to create the service file
+
 -->sudo nano /etc/systemd/system/master_nebuleair.service
 
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