Number Property (named “TimerValue”) Set default value to 40, the scope to global, if everyone sees the same time. For counter starting value, 40, the target value 0, update property yes, select TimerValue, decrement when reviving on, create a channel (TimerTick)
The repeater task interval, 1.0 seconds, trigger on task start: No, when task occurs, transmit on “Timertick” Start repeater when receiving on, "starttimer, or GameStart.
Than for the overlay, the overlay type is text, the text is property:TimerValue, when property changes, transmit on: “update overlay” (optional)
Connect a lifecycle (on game start) to start repeater, (receive on “start timer”)
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