Message repetition(loop)

[lpcurcio]

I'm using the Google Home Script Editor, but I'm not able to resolve an issue.
How do I make the Nest Mini repeat a message every 30 seconds.
Example: While the door is open, it will alert you every 30 seconds until the door is closed.

Bard suggested using the script below, but "type: repeat" is not recognized.

actions:
  - type: repeat
    interval: 30
    actions:
      - type: sendMessage
        to: Nest Mini
        message: Door is open