1. In models/ResultData.model.bxb

structure (ResultData) {
  description ('Returning result')
  property (message) {
    type (Result)
    min (Optional) max (One)
  }
}

2. code/PlayMeow.js return {
    message: 'Meow'
  };

3. models\PlayMeow.model.bxb changed

output (ResultData)

4. resources/en/result.view.bxb
 result-view {
  match: ResultData (resultData) {
    from-output: PlayMeow
  }

  render {
    layout {
      section {
        content {
          paragraph {
            style (Title_L)
            value ("#{value(resultData.message)}")
          }
        }
      }
    }
  }
}