Uh, it is a controllor to maintain a cooldown.
(Cooldown in wiki
...One can think of cooldown as the reload time and firing rate of weapons. For example, a machine gun has very fast firing rate, so it has a very low cooldown between shots. Comparatively, a shotgun has a long reload/cooldown time between each shots....)
Download Timeline plugin first. (Cooldown is another timer application.)
<img src="http://i1081.photobucket.com/albums/j352/rexrainbow1/screen1-31_zps29b69f2c.png" border="0">
"action: request a call".
- if internal timer is not running, plugin will trigger the event "condition: on call accepted". Then start the internal timer with time-out to cooldown interval.
- if internal timer is running, plugin will trigger the event "condition: on call rejected".
A sprite can have more then one cooldown behavior.