root:
  items:
    - type: scroll-frame
      bounds: [10, 10, 50, 50]
      content-size: [100, 100]
      items:
        - type: rect
          bounds: [10, 10, 500, 500]
          color: green
    - type: scroll-frame
      bounds: [70, 10, 50, 50]
      content-size: [100, 100]
      items:
        - type: rect
          bounds: [70, 10, 100, 100]
          color: green