a-simpler-camera-server.md

@@ -147,12 +147,31 @@ note: do not close the terminal window, let it run endlessly
 
 in case the window gets closed, just re-do step 1, 3, 9
 
-advanced: if you have more cameras, repeat these steps, and open
-more terminal windows (one per camera) fetching the unique camera
+#### advanced camera scripts
+
+if you have more than one camera, repeat these steps with more
+terminal windows (one per camera) fetching the unique camera
 snapshot url. don't forget to change the `-O` parameter so that each
 camera will be written to a different snapshot file e.g. 
 "`wget ... -O cam1.jpg`", "`wget ... -O cam2.jpg`", etc
 
+alternatively, you can also create a single file `.sh` like this:
+
+```
+wget <cam 1 snapshot url, as before> -O cam1.jpg
+wget <cam 2 snapshot url, as before> -O cam2.jpg
+wget <cam X snapshot url, as before> -O camX.jpg
+sleep 3
+./camera.sh
+```
+
+lastly, if you don't like the `sleep 3` and `./camera.sh` line
+that calls the file over and over again, you can also use the
+`watch` command to schedule periodic running of the file
+e.g. `watch -n 5 ./camera.sh` - note: it is beyond the scope
+of this document to discuss usage of this command, but feel
+free to try it out :)
+
 ### camera server - part 1: preparing the environment
 
 we must install `php` on the raspberry pi so we can run a