Reply on chromecast message

Newbee question I have not been able to find the answer on?

I want to send a msg to my chromecast only after it has already spoken another msg. first. The first msg id triggered by a door sensor + 30 sec delay and then go into a loop. When the door is closed I want a reply, but only if the first was played, not if the door was opened and closed within the 30 sec.
I have tried to play with the boolean-node the trigger-node and the AND/OR gates. I am just too "stupid" to find a good solution? please point me in the right direction.

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