---
root:
  items:
    - type: stacking-context
      bounds: [0, 0, 200, 200]
      items:
        - type: rect
          bounds: [ 0, 0, 90, 100 ]
          color: [0, 150, 0]
        - type: rect
          bounds: [ 10, 100, 90, 100 ]
          color: [150, 0, 0]