The stop.cycling command is used to stop it from cycling through the cels in the loop. There is only 1 cel in the loop for this object, so the command isn't really necessary, but it is a good idea to do so in case you add some more cels later or something. The set.loop and set.cel commands aren't absolutely necessary either, but it'is also a good idea to use them so you know for sure which loop and which cel is being used.