Multiple phones/units to interact with the same scene, in sync

I have a symbol with a question mark.

When clicked on it changes from grey to white.

I am to run this on multiple phones at the same time. When being clicked on from one random unit, I want the transition to be shown on all phones. Is that possible? (26.9 KB)

you can use Server Sent Events or websockets or Long polling or a service like pusher: Synchronise 2 Macs with animations - #2 by MaxZieb

a rudimentary setup for sse: (109,0 KB)