Configure 1 switch to control 3 fibaro roller shutters

Hello,
I have the following setup for my blinds.
1 switch is connected to 1 roller shutter, whereas two others are not connected to any switch at all. I can only control them via the app. Now I want to create a script/automation, so that whenever I press the switch all 3 blinds move simultaneously (and hopefully in sync). For this I already activated a scene on the roller shutter. I receive 1 event for pressing, and one for releasing the switch. Unfortunately, the events look the same. So for HA it is not clear, if it is a on or an off event. Any idea how such a script can look like? Is creating a script the best idea? Love to hear your feedback. Thanks!